15991838152 has 8 divisors (see below), whose sum is σ = 29984696550. Its totient is φ = 7995919072.

The previous prime is 15991838143. The next prime is 15991838173. The reversal of 15991838152 is 25183819951.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14444674596 + 1547163556 = 120186^2 + 39334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 15991838152.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999489877 + ... + 999489892.

Almost surely, 2^15991838152 is an apocalyptic number.

It is an amenable number.

15991838152 is a deficient number, since it is larger than the sum of its proper divisors (13992858398).

15991838152 is a wasteful number, since it uses less digits than its factorization.

15991838152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998979775 (or 1998979771 counting only the distinct ones).

The product of its digits is 777600, while the sum is 52.

The spelling of 15991838152 in words is "fifteen billion, nine hundred ninety-one million, eight hundred thirty-eight thousand, one hundred fifty-two".