2156253420708 has 48 divisors (see below), whose sum is σ = 5657639520960. Its totient is φ = 710091484992.

The previous prime is 2156253420691. The next prime is 2156253420709. The reversal of 2156253420708 is 8070243526512.

2156253420708 is a `hidden beast` number, since 2 + 15 + 625 + 3 + 4 + 2 + 0 + 7 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (2156253420709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120263985 + ... + 120281912.

It is an arithmetic number, because the mean of its divisors is an integer number (117867490020).

Almost surely, 2^{2156253420708} is an apocalyptic number.

It is an amenable number.

2156253420708 is an abundant number, since it is smaller than the sum of its proper divisors (3501386100252).

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

2156253420708 is a wasteful number, since it uses less digits than its factorization.

2156253420708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240545993 (or 240545985 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 2156253420708 in words is "two trillion, one hundred fifty-six billion, two hundred fifty-three million, four hundred twenty thousand, seven hundred eight".