155928689280 has 2048 divisors, whose sum is σ = 760015872000. Its totient is φ = 29238755328.

The previous prime is 155928689249. The next prime is 155928689341. The reversal of 155928689280 is 82986829551.

155928689280 is a `hidden beast` number, since 15 + 592 + 8 + 6 + 8 + 9 + 28 + 0 = 666.

It is a super-2 number, since 2×155928689280² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 507910887 + ... + 507911193.

It is an arithmetic number, because the mean of its divisors is an integer number (371101500).

Almost surely, 2^155928689280 is an apocalyptic number.

155928689280 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 155928689280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380007936000).

155928689280 is an abundant number, since it is smaller than the sum of its proper divisors (604087182720).

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

155928689280 is a wasteful number, since it uses less digits than its factorization.

155928689280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 155928689280 in words is "one hundred fifty-five billion, nine hundred twenty-eight million, six hundred eighty-nine thousand, two hundred eighty".