155412639380 has 48 divisors (see below), whose sum is σ = 334652172624. Its totient is φ = 60589793280.

The previous prime is 155412639377. The next prime is 155412639383. The reversal of 155412639380 is 83936214551.

It is an interprime number because it is at equal distance from previous prime (155412639377) and next prime (155412639383).

It can be written as a sum of positive squares in 8 ways, for example, as 13505228944 + 141907410436 = 116212^2 + 376706^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155412639383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755324 + ... + 938796.

It is an arithmetic number, because the mean of its divisors is an integer number (6971920263).

Almost surely, 2^155412639380 is an apocalyptic number.

155412639380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155412639380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167326086312).

155412639380 is an abundant number, since it is smaller than the sum of its proper divisors (179239533244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155412639380 is a wasteful number, since it uses less digits than its factorization.

155412639380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184556 (or 184554 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 155412639380 in words is "one hundred fifty-five billion, four hundred twelve million, six hundred thirty-nine thousand, three hundred eighty".