15943072440 has 32 divisors (see below), whose sum is σ = 47829217680. Its totient is φ = 4251485952.

The previous prime is 15943072421. The next prime is 15943072441. The reversal of 15943072440 is 4427034951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15943072441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66429349 + ... + 66429588.

Almost surely, 2^15943072440 is an apocalyptic number.

15943072440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15943072440 is an abundant number, since it is smaller than the sum of its proper divisors (31886145240).

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

15943072440 is a wasteful number, since it uses less digits than its factorization.

15943072440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132858951 (or 132858947 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 15943072440 in words is "fifteen billion, nine hundred forty-three million, seventy-two thousand, four hundred forty".