15938215940 has 24 divisors (see below), whose sum is σ = 33969812352. Its totient is φ = 6280132320.

The previous prime is 15938215939. The next prime is 15938215961. The reversal of 15938215940 is 4951283951.

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, 5945756 + ... + 5948435.

It is an arithmetic number, because the mean of its divisors is an integer number (1415408848).

Almost surely, 2^15938215940 is an apocalyptic number.

15938215940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15938215940 is an abundant number, since it is smaller than the sum of its proper divisors (18031596412).

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

15938215940 is a wasteful number, since it uses less digits than its factorization.

15938215940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11894267 (or 11894265 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 15938215940 in words is "fifteen billion, nine hundred thirty-eight million, two hundred fifteen thousand, nine hundred forty".