2157875370658 has 16 divisors (see below), whose sum is σ = 3700254988224. Its totient is φ = 924543713520.

The previous prime is 2157875370617. The next prime is 2157875370659. The reversal of 2157875370658 is 8560735787512.

It is a super-2 number, since 2×2157875370658² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2157875370658.

It is not an unprimeable number, because it can be changed into a prime (2157875370659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21616488 + ... + 21716083.

It is an arithmetic number, because the mean of its divisors is an integer number (231265936764).

Almost surely, 2^{2157875370658} is an apocalyptic number.

2157875370658 is a deficient number, since it is larger than the sum of its proper divisors (1542379617566).

2157875370658 is a wasteful number, since it uses less digits than its factorization.

2157875370658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43336137.

The product of its (nonzero) digits is 98784000, while the sum is 64.

The spelling of 2157875370658 in words is "two trillion, one hundred fifty-seven billion, eight hundred seventy-five million, three hundred seventy thousand, six hundred fifty-eight".