15707640880 has 20 divisors (see below), whose sum is σ = 36520265232. Its totient is φ = 6283056320.

The previous prime is 15707640877. The next prime is 15707640887. The reversal of 15707640880 is 8804670751.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 15707640880.

It is not an unprimeable number, because it can be changed into a prime (15707640887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98172676 + ... + 98172835.

Almost surely, 2^15707640880 is an apocalyptic number.

15707640880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15707640880 is an abundant number, since it is smaller than the sum of its proper divisors (20812624352).

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

15707640880 is a wasteful number, since it uses less digits than its factorization.

15707640880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196345524 (or 196345518 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 15707640880 in words is "fifteen billion, seven hundred seven million, six hundred forty thousand, eight hundred eighty".