2156657625954 has 48 divisors (see below), whose sum is σ = 5032651965432. Its totient is φ = 663527510784.

The previous prime is 2156657625931. The next prime is 2156657626001. The reversal of 2156657625954 is 4595267566512.

2156657625954 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 6 + 576 + 2 + 5 + 9 + 54 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1586776066929 + 569881559025 = 1259673^2 + 754905^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2156657625891 and 2156657625900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2240982 + ... + 3055374.

Almost surely, 2^{2156657625954} is an apocalyptic number.

2156657625954 is an abundant number, since it is smaller than the sum of its proper divisors (2875994339478).

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

2156657625954 is a wasteful number, since it uses less digits than its factorization.

2156657625954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825731 (or 825728 counting only the distinct ones).

The product of its digits is 136080000, while the sum is 63.

The spelling of 2156657625954 in words is "two trillion, one hundred fifty-six billion, six hundred fifty-seven million, six hundred twenty-five thousand, nine hundred fifty-four".