2156657625873 has 12 divisors (see below), whose sum is σ = 3115510741200. Its totient is φ = 1437615466776.

The previous prime is 2156657625847. The next prime is 2156657625917. The reversal of 2156657625873 is 3785267566512.

2156657625873 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 6 + 576 + 2 + 58 + 7 + 3 = 666.

It is not a de Polignac number, because 2156657625873 - 2⁶ = 2156657625809 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156657625873.

It is not an unprimeable number, because it can be changed into a prime (2156657626873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12936223 + ... + 13101876.

It is an arithmetic number, because the mean of its divisors is an integer number (259625895100).

Almost surely, 2^{2156657625873} is an apocalyptic number.

It is an amenable number.

2156657625873 is a deficient number, since it is larger than the sum of its proper divisors (958853115327).

2156657625873 is a wasteful number, since it uses less digits than its factorization.

2156657625873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26047308 (or 26047305 counting only the distinct ones).

The product of its digits is 127008000, while the sum is 63.

The spelling of 2156657625873 in words is "two trillion, one hundred fifty-six billion, six hundred fifty-seven million, six hundred twenty-five thousand, eight hundred seventy-three".