15816544544652 has 24 divisors (see below), whose sum is σ = 36941487777600. Its totient is φ = 5267007632976.

The previous prime is 15816544544629. The next prime is 15816544544659. The reversal of 15816544544652 is 25644544561851.

It is a super-2 number, since 2×15816544544652² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15816544544659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646722502 + ... + 646746957.

It is an arithmetic number, because the mean of its divisors is an integer number (1539228657400).

Almost surely, 2^{15816544544652} is an apocalyptic number.

15816544544652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15816544544652 is an abundant number, since it is smaller than the sum of its proper divisors (21124943232948).

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

15816544544652 is a wasteful number, since it uses less digits than its factorization.

15816544544652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293470485 (or 1293470483 counting only the distinct ones).

The product of its digits is 92160000, while the sum is 60.

The spelling of 15816544544652 in words is "fifteen trillion, eight hundred sixteen billion, five hundred forty-four million, five hundred forty-four thousand, six hundred fifty-two".