2142618656 has 24 divisors (see below), whose sum is σ = 4287436524. Its totient is φ = 1053745920.

The previous prime is 2142618649. The next prime is 2142618691. The reversal of 2142618656 is 6568162412.

It can be written as a sum of positive squares in 2 ways, for example, as 2136288400 + 6330256 = 46220^2 + 2516^2 .

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, 546875 + ... + 550778.

Almost surely, 2^2142618656 is an apocalyptic number.

It is an amenable number.

2142618656 is an abundant number, since it is smaller than the sum of its proper divisors (2144817868).

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

2142618656 is a wasteful number, since it uses less digits than its factorization.

2142618656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097724 (or 1097716 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 2142618656 is about 46288.4289644831. The cubic root of 2142618656 is about 1289.1841597438.

The spelling of 2142618656 in words is "two billion, one hundred forty-two million, six hundred eighteen thousand, six hundred fifty-six".