15944493432 has 32 divisors (see below), whose sum is σ = 45555696000. Its totient is φ = 4555569504.

The previous prime is 15944493419. The next prime is 15944493463. The reversal of 15944493432 is 23439444951.

It is a super-2 number, since 2×15944493432² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47453682 + ... + 47454017.

It is an arithmetic number, because the mean of its divisors is an integer number (1423615500).

Almost surely, 2^15944493432 is an apocalyptic number.

15944493432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15944493432 is an abundant number, since it is smaller than the sum of its proper divisors (29611202568).

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

15944493432 is a wasteful number, since it uses less digits than its factorization.

15944493432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94907715 (or 94907711 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The spelling of 15944493432 in words is "fifteen billion, nine hundred forty-four million, four hundred ninety-three thousand, four hundred thirty-two".