15558044992 has 168 divisors, whose sum is σ = 36789937088. Its totient is φ = 6393323520.

The previous prime is 15558044963. The next prime is 15558045017. The reversal of 15558044992 is 29944085551.

It is a happy number.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54975283 + ... + 54975565.

Almost surely, 2^15558044992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15558044992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18394968544).

15558044992 is an abundant number, since it is smaller than the sum of its proper divisors (21231892096).

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

15558044992 is an equidigital number, since it uses as much as digits as its factorization.

15558044992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 15558044992 in words is "fifteen billion, five hundred fifty-eight million, forty-four thousand, nine hundred ninety-two".