155621626872 has 32 divisors (see below), whose sum is σ = 389199886080. Its totient is φ = 51854433120.

The previous prime is 155621626861. The next prime is 155621626921. The reversal of 155621626872 is 278626126551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149718 + ... + 1277925.

It is an arithmetic number, because the mean of its divisors is an integer number (12162496440).

Almost surely, 2^155621626872 is an apocalyptic number.

155621626872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155621626872 is an abundant number, since it is smaller than the sum of its proper divisors (233578259208).

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

155621626872 is a wasteful number, since it uses less digits than its factorization.

155621626872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430323 (or 2430319 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The spelling of 155621626872 in words is "one hundred fifty-five billion, six hundred twenty-one million, six hundred twenty-six thousand, eight hundred seventy-two".