15717071220 has 48 divisors (see below), whose sum is σ = 44205181440. Its totient is φ = 4172420736.

The previous prime is 15717071219. The next prime is 15717071239. The reversal of 15717071220 is 2217071751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573955 + ... + 600714.

It is an arithmetic number, because the mean of its divisors is an integer number (920941280).

Almost surely, 2^15717071220 is an apocalyptic number.

15717071220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15717071220 is an abundant number, since it is smaller than the sum of its proper divisors (28488110220).

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

15717071220 is a wasteful number, since it uses less digits than its factorization.

15717071220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174904 (or 1174902 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 33.

The spelling of 15717071220 in words is "fifteen billion, seven hundred seventeen million, seventy-one thousand, two hundred twenty".