15990707970 has 48 divisors (see below), whose sum is σ = 41943795192. Its totient is φ = 4226449920.

The previous prime is 15990707927. The next prime is 15990708023. The reversal of 15990707970 is 7970709951.

It can be written as a sum of positive squares in 4 ways, for example, as 9939890601 + 6050817369 = 99699^2 + 77787^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 776001 + ... + 796340.

Almost surely, 2^15990707970 is an apocalyptic number.

15990707970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15990707970 is an abundant number, since it is smaller than the sum of its proper divisors (25953087222).

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

15990707970 is a wasteful number, since it uses less digits than its factorization.

15990707970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572467 (or 1572464 counting only the distinct ones).

The product of its (nonzero) digits is 1250235, while the sum is 54.

The spelling of 15990707970 in words is "fifteen billion, nine hundred ninety million, seven hundred seven thousand, nine hundred seventy".