155266681680 has 320 divisors, whose sum is σ = 589449772800. Its totient is φ = 37251809280.

The previous prime is 155266681663. The next prime is 155266681699. The reversal of 155266681680 is 86186662551.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2271036 + ... + 2338404.

It is an arithmetic number, because the mean of its divisors is an integer number (1842030540).

Almost surely, 2^155266681680 is an apocalyptic number.

155266681680 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 155266681680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294724886400).

155266681680 is an abundant number, since it is smaller than the sum of its proper divisors (434183091120).

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

155266681680 is a wasteful number, since it uses less digits than its factorization.

155266681680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67499 (or 67487 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 155266681680 in words is "one hundred fifty-five billion, two hundred sixty-six million, six hundred eighty-one thousand, six hundred eighty".