2157945174 has 96 divisors (see below), whose sum is σ = 5911626240. Its totient is φ = 552585600.

The previous prime is 2157945161. The next prime is 2157945193. The reversal of 2157945174 is 4715497512.

2157945174 is a `hidden beast` number, since 2 + 1 + 579 + 4 + 5 + 1 + 74 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87442 + ... + 109370.

It is an arithmetic number, because the mean of its divisors is an integer number (61579440).

Almost surely, 2^2157945174 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157945174, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2955813120).

2157945174 is an abundant number, since it is smaller than the sum of its proper divisors (3753681066).

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

2157945174 is a wasteful number, since it uses less digits than its factorization.

2157945174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22026 (or 22023 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 2157945174 is about 46453.6884864916. The cubic root of 2157945174 is about 1292.2507776331.

The spelling of 2157945174 in words is "two billion, one hundred fifty-seven million, nine hundred forty-five thousand, one hundred seventy-four".