2155616326512 has 60 divisors (see below), whose sum is σ = 6581161971384. Its totient is φ = 653217068160.

The previous prime is 2155616326499. The next prime is 2155616326573. The reversal of 2155616326512 is 2156236165512.

2155616326512 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 6 + 1 + 632 + 6 + 5 + 1 + 2 = 666.

It is a super-2 number, since 2×2155616326512² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 680432863 + ... + 680436030.

Almost surely, 2^{2155616326512} is an apocalyptic number.

2155616326512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2155616326512 is an abundant number, since it is smaller than the sum of its proper divisors (4425545644872).

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

2155616326512 is a wasteful number, since it uses less digits than its factorization.

2155616326512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360868918 (or 1360868909 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 2155616326512 in words is "two trillion, one hundred fifty-five billion, six hundred sixteen million, three hundred twenty-six thousand, five hundred twelve".