15731948990 has 16 divisors (see below), whose sum is σ = 28353503952. Its totient is φ = 6284780544.

The previous prime is 15731948989. The next prime is 15731949017. The reversal of 15731948990 is 9984913751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991619 + ... + 1007358.

It is an arithmetic number, because the mean of its divisors is an integer number (1772093997).

Almost surely, 2^15731948990 is an apocalyptic number.

15731948990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15731948990 is a deficient number, since it is larger than the sum of its proper divisors (12621554962).

15731948990 is a wasteful number, since it uses less digits than its factorization.

15731948990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999771.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 15731948990 in words is "fifteen billion, seven hundred thirty-one million, nine hundred forty-eight thousand, nine hundred ninety".