15664293880434 has 24 divisors (see below), whose sum is σ = 33953173263360. Its totient is φ = 5219297469528.

The previous prime is 15664293880357. The next prime is 15664293880451. The reversal of 15664293880434 is 43408839246651.

15664293880434 is a `hidden beast` number, since 1 + 5 + 66 + 429 + 38 + 80 + 43 + 4 = 666.

It is a super-2 number, since 2×15664293880434² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177773394 + ... + 177861485.

It is an arithmetic number, because the mean of its divisors is an integer number (1414715552640).

Almost surely, 2^{15664293880434} is an apocalyptic number.

15664293880434 is an abundant number, since it is smaller than the sum of its proper divisors (18288879382926).

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

15664293880434 is a wasteful number, since it uses less digits than its factorization.

15664293880434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355637334 (or 355637331 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 63.

The spelling of 15664293880434 in words is "fifteen trillion, six hundred sixty-four billion, two hundred ninety-three million, eight hundred eighty thousand, four hundred thirty-four".