15644364652 has 18 divisors (see below), whose sum is σ = 31847457012. Its totient is φ = 6704727624.

The previous prime is 15644364583. The next prime is 15644364709. The reversal of 15644364652 is 25646344651.

It is a super-2 number, since 2×15644364652² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39908898 + ... + 39909289.

Almost surely, 2^15644364652 is an apocalyptic number.

It is an amenable number.

15644364652 is an abundant number, since it is smaller than the sum of its proper divisors (16203092360).

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

15644364652 is a wasteful number, since it uses less digits than its factorization.

15644364652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79818205 (or 79818196 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

The spelling of 15644364652 in words is "fifteen billion, six hundred forty-four million, three hundred sixty-four thousand, six hundred fifty-two".