155552520000 has 280 divisors, whose sum is σ = 532039068000. Its totient is φ = 40049408000.

The previous prime is 155552519987. The next prime is 155552520007. The reversal of 155552520000 is 25255551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 155552520000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155552520007) 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 39 ways as a sum of consecutive naturals, for example, 3457651 + ... + 3502349.

Almost surely, 2^155552520000 is an apocalyptic number.

155552520000 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 155552520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266019534000).

155552520000 is an abundant number, since it is smaller than the sum of its proper divisors (376486548000).

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

155552520000 is an equidigital number, since it uses as much as digits as its factorization.

155552520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44763 (or 44738 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

Adding to 155552520000 its reverse (25255551), we get a palindrome (155577775551).

The spelling of 155552520000 in words is "one hundred fifty-five billion, five hundred fifty-two million, five hundred twenty thousand".