15666325632 has 96 divisors (see below), whose sum is σ = 45426054960. Its totient is φ = 5182195200.

The previous prime is 15666325627. The next prime is 15666325643. The reversal of 15666325632 is 23652366651.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99007 + ... + 202817.

Almost surely, 2^15666325632 is an apocalyptic number.

15666325632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15666325632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22713027480).

15666325632 is an abundant number, since it is smaller than the sum of its proper divisors (29759729328).

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

15666325632 is a wasteful number, since it uses less digits than its factorization.

15666325632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103962 (or 103947 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The spelling of 15666325632 in words is "fifteen billion, six hundred sixty-six million, three hundred twenty-five thousand, six hundred thirty-two".