15993516492 has 72 divisors (see below), whose sum is σ = 41437556160. Its totient is φ = 5198467680.

The previous prime is 15993516403. The next prime is 15993516533. The reversal of 15993516492 is 29461539951.

15993516492 is a `hidden beast` number, since 1 + 59 + 93 + 5 + 16 + 492 = 666.

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, 949867 + ... + 966557.

Almost surely, 2^15993516492 is an apocalyptic number.

15993516492 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 15993516492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20718778080).

15993516492 is an abundant number, since it is smaller than the sum of its proper divisors (25444039668).

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

15993516492 is a wasteful number, since it uses less digits than its factorization.

15993516492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17363 (or 17358 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The spelling of 15993516492 in words is "fifteen billion, nine hundred ninety-three million, five hundred sixteen thousand, four hundred ninety-two".