189574391464 has 32 divisors (see below), whose sum is σ = 376404229800. Its totient is φ = 89201213440.

The previous prime is 189574391399. The next prime is 189574391491. The reversal of 189574391464 is 464193475981.

It can be written as a sum of positive squares in 4 ways, for example, as 169696211364 + 19878180100 = 411942^2 + 140990^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178472 + ... + 1329640.

Almost surely, 2^189574391464 is an apocalyptic number.

It is an amenable number.

189574391464 is a deficient number, since it is larger than the sum of its proper divisors (186829838336).

189574391464 is a wasteful number, since it uses less digits than its factorization.

189574391464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160413 (or 160409 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

The spelling of 189574391464 in words is "one hundred eighty-nine billion, five hundred seventy-four million, three hundred ninety-one thousand, four hundred sixty-four".