15365643252 has 12 divisors (see below), whose sum is σ = 35853167616. Its totient is φ = 5121881080.

The previous prime is 15365643217. The next prime is 15365643269. The reversal of 15365643252 is 25234656351.

It is a happy number.

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

It is a super-2 number, since 2×15365643252² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 640235124 + ... + 640235147.

It is an arithmetic number, because the mean of its divisors is an integer number (2987763968).

Almost surely, 2^15365643252 is an apocalyptic number.

15365643252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15365643252 is an abundant number, since it is smaller than the sum of its proper divisors (20487524364).

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

15365643252 is a wasteful number, since it uses less digits than its factorization.

15365643252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280470278 (or 1280470276 counting only the distinct ones).

The product of its digits is 648000, while the sum is 42.

The spelling of 15365643252 in words is "fifteen billion, three hundred sixty-five million, six hundred forty-three thousand, two hundred fifty-two".