15960390642 has 72 divisors (see below), whose sum is σ = 41613893100. Its totient is φ = 4402859328.

The previous prime is 15960390617. The next prime is 15960390643. The reversal of 15960390642 is 24609306951.

It can be written as a sum of positive squares in 2 ways, for example, as 13923764001 + 2036626641 = 117999^2 + 45129^2 .

It is not an unprimeable number, because it can be changed into a prime (15960390643) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 286417 + ... + 337572.

Almost surely, 2^15960390642 is an apocalyptic number.

15960390642 is an abundant number, since it is smaller than the sum of its proper divisors (25653502458).

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

15960390642 is a wasteful number, since it uses less digits than its factorization.

15960390642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624040 (or 624030 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 15960390642 in words is "fifteen billion, nine hundred sixty million, three hundred ninety thousand, six hundred forty-two".