2158831735874 has 12 divisors (see below), whose sum is σ = 3559396126902. Its totient is φ = 981287152560.

The previous prime is 2158831735849. The next prime is 2158831735933. The reversal of 2158831735874 is 4785371388512.

It can be written as a sum of positive squares in only one way, i.e., 1682948371225 + 475883364649 = 1297285^2 + 689843^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4460395907 + ... + 4460396390.

Almost surely, 2^{2158831735874} is an apocalyptic number.

2158831735874 is a deficient number, since it is larger than the sum of its proper divisors (1400564391028).

2158831735874 is a wasteful number, since it uses less digits than its factorization.

2158831735874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8920792321 (or 8920792310 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 62.

The spelling of 2158831735874 in words is "two trillion, one hundred fifty-eight billion, eight hundred thirty-one million, seven hundred thirty-five thousand, eight hundred seventy-four".