15663275072 has 14 divisors (see below), whose sum is σ = 31081811598. Its totient is φ = 7831637504.

The previous prime is 15663275063. The next prime is 15663275099. The reversal of 15663275072 is 27057236651.

It can be written as a sum of positive squares in only one way, i.e., 14081144896 + 1582130176 = 118664^2 + 39776^2 .

It is a super-2 number, since 2×15663275072² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122369273 + ... + 122369400.

Almost surely, 2^15663275072 is an apocalyptic number.

It is an amenable number.

15663275072 is a deficient number, since it is larger than the sum of its proper divisors (15418536526).

15663275072 is an equidigital number, since it uses as much as digits as its factorization.

15663275072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244738685 (or 244738675 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 15663275072 in words is "fifteen billion, six hundred sixty-three million, two hundred seventy-five thousand, seventy-two".