2156657625874 has 8 divisors (see below), whose sum is σ = 3234995636940. Its totient is φ = 1078325746896.

The previous prime is 2156657625847. The next prime is 2156657625917. The reversal of 2156657625874 is 4785267566512.

It can be written as a sum of positive squares in 2 ways, for example, as 2152925271225 + 3732354649 = 1467285^2 + 61093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519849 + ... + 2140924.

Almost surely, 2^{2156657625874} is an apocalyptic number.

2156657625874 is a deficient number, since it is larger than the sum of its proper divisors (1078338011066).

2156657625874 is a wasteful number, since it uses less digits than its factorization.

2156657625874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066044.

The product of its digits is 169344000, while the sum is 64.

The spelling of 2156657625874 in words is "two trillion, one hundred fifty-six billion, six hundred fifty-seven million, six hundred twenty-five thousand, eight hundred seventy-four".