15564895212 has 12 divisors (see below), whose sum is σ = 36318088856. Its totient is φ = 5188298400.

The previous prime is 15564895187. The next prime is 15564895219. The reversal of 15564895212 is 21259846551.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (15564895219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648537289 + ... + 648537312.

Almost surely, 2^15564895212 is an apocalyptic number.

15564895212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15564895212 is an abundant number, since it is smaller than the sum of its proper divisors (20753193644).

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

15564895212 is a wasteful number, since it uses less digits than its factorization.

15564895212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297074608 (or 1297074606 counting only the distinct ones).

The product of its digits is 864000, while the sum is 48.

The spelling of 15564895212 in words is "fifteen billion, five hundred sixty-four million, eight hundred ninety-five thousand, two hundred twelve".