15990707990 has 96 divisors (see below), whose sum is σ = 32096756736. Its totient is φ = 5726064960.

The previous prime is 15990707927. The next prime is 15990708023. The reversal of 15990707990 is 9970709951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4810469 + ... + 4813791.

It is an arithmetic number, because the mean of its divisors is an integer number (334341216).

Almost surely, 2^15990707990 is an apocalyptic number.

15990707990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15990707990 is an abundant number, since it is smaller than the sum of its proper divisors (16106048746).

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

15990707990 is a wasteful number, since it uses less digits than its factorization.

15990707990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3423 counting only the distinct ones).

The product of its (nonzero) digits is 1607445, while the sum is 56.

The spelling of 15990707990 in words is "fifteen billion, nine hundred ninety million, seven hundred seven thousand, nine hundred ninety".