189214661264 has 20 divisors (see below), whose sum is σ = 388168313004. Its totient is φ = 89042193408.

The previous prime is 189214661257. The next prime is 189214661371. The reversal of 189214661264 is 462166412981.

It can be written as a sum of positive squares in 2 ways, for example, as 158276665600 + 30937995664 = 397840^2 + 175892^2 .

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, 347820797 + ... + 347821340.

Almost surely, 2^189214661264 is an apocalyptic number.

It is an amenable number.

189214661264 is an abundant number, since it is smaller than the sum of its proper divisors (198953651740).

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

189214661264 is a wasteful number, since it uses less digits than its factorization.

189214661264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695642162 (or 695642156 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The spelling of 189214661264 in words is "one hundred eighty-nine billion, two hundred fourteen million, six hundred sixty-one thousand, two hundred sixty-four".