2157558612 has 48 divisors (see below), whose sum is σ = 5499766272. Its totient is φ = 652877280.

The previous prime is 2157558577. The next prime is 2157558619. The reversal of 2157558612 is 2168557512.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157558619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84723 + ... + 107205.

It is an arithmetic number, because the mean of its divisors is an integer number (114578464).

Almost surely, 2^2157558612 is an apocalyptic number.

2157558612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2157558612 is an abundant number, since it is smaller than the sum of its proper divisors (3342207660).

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

2157558612 is a wasteful number, since it uses less digits than its factorization.

2157558612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23228 (or 23226 counting only the distinct ones).

The product of its digits is 168000, while the sum is 42.

The square root of 2157558612 is about 46449.5275756385. The cubic root of 2157558612 is about 1292.1736108787.

The spelling of 2157558612 in words is "two billion, one hundred fifty-seven million, five hundred fifty-eight thousand, six hundred twelve".