15979379949 has 16 divisors (see below), whose sum is σ = 25494168000. Its totient is φ = 9833464368.

The previous prime is 15979379947. The next prime is 15979379951. The reversal of 15979379949 is 94997397951.

It is an interprime number because it is at equal distance from previous prime (15979379947) and next prime (15979379951).

It is not a de Polignac number, because 15979379949 - 2¹ = 15979379947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15979379947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22762299 + ... + 22763000.

It is an arithmetic number, because the mean of its divisors is an integer number (1593385500).

Almost surely, 2^15979379949 is an apocalyptic number.

It is an amenable number.

15979379949 is a deficient number, since it is larger than the sum of its proper divisors (9514788051).

15979379949 is a wasteful number, since it uses less digits than its factorization.

15979379949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45525321 (or 45525315 counting only the distinct ones).

The product of its digits is 173604060, while the sum is 72.

The spelling of 15979379949 in words is "fifteen billion, nine hundred seventy-nine million, three hundred seventy-nine thousand, nine hundred forty-nine".