161626216256120 has 128 divisors (see below), whose sum is σ = 453408993999360. Its totient is φ = 50375227829760.

The previous prime is 161626216256117. The next prime is 161626216256143. The reversal of 161626216256120 is 21652612626161.

It is a super-2 number, since 2×161626216256120² (a number of 29 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 31 ways as a sum of consecutive naturals, for example, 87908087 + ... + 89727833.

It is an arithmetic number, because the mean of its divisors is an integer number (3542257765620).

Almost surely, 2^{161626216256120} is an apocalyptic number.

161626216256120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161626216256120 is an abundant number, since it is smaller than the sum of its proper divisors (291782777743240).

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

161626216256120 is a wasteful number, since it uses less digits than its factorization.

161626216256120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848613 (or 1848609 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 161626216256120 in words is "one hundred sixty-one trillion, six hundred twenty-six billion, two hundred sixteen million, two hundred fifty-six thousand, one hundred twenty".