15679902840 has 128 divisors (see below), whose sum is σ = 53815656960. Its totient is φ = 3580245504.

The previous prime is 15679902781. The next prime is 15679902871. The reversal of 15679902840 is 4820997651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 841707 + ... + 860133.

It is an arithmetic number, because the mean of its divisors is an integer number (420434820).

Almost surely, 2^15679902840 is an apocalyptic number.

15679902840 is a gapful number since it is divisible by the number (10) 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 15679902840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26907828480).

15679902840 is an abundant number, since it is smaller than the sum of its proper divisors (38135754120).

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

15679902840 is a wasteful number, since it uses less digits than its factorization.

15679902840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19461 (or 19457 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 15679902840 in words is "fifteen billion, six hundred seventy-nine million, nine hundred two thousand, eight hundred forty".