15121664652 has 48 divisors (see below), whose sum is σ = 35759953152. Its totient is φ = 4972900800.

The previous prime is 15121664651. The next prime is 15121664671. The reversal of 15121664652 is 25646612151.

It is a super-2 number, since 2×15121664652² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15121664652.

It is not an unprimeable number, because it can be changed into a prime (15121664651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320953 + ... + 365039.

It is an arithmetic number, because the mean of its divisors is an integer number (744999024).

Almost surely, 2^15121664652 is an apocalyptic number.

15121664652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15121664652 is an abundant number, since it is smaller than the sum of its proper divisors (20638288500).

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

15121664652 is a wasteful number, since it uses less digits than its factorization.

15121664652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44478 (or 44476 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The spelling of 15121664652 in words is "fifteen billion, one hundred twenty-one million, six hundred sixty-four thousand, six hundred fifty-two".