15249806979 has 8 divisors (see below), whose sum is σ = 22181537472. Its totient is φ = 9242307240.

The previous prime is 15249806963. The next prime is 15249806981. The reversal of 15249806979 is 97960894251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15249806979 - 2⁴ = 15249806963 is a prime.

It is a super-2 number, since 2×15249806979² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15249806179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231057649 + ... + 231057714.

It is an arithmetic number, because the mean of its divisors is an integer number (2772692184).

Almost surely, 2^15249806979 is an apocalyptic number.

15249806979 is a deficient number, since it is larger than the sum of its proper divisors (6931730493).

15249806979 is a wasteful number, since it uses less digits than its factorization.

15249806979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462115377.

The product of its (nonzero) digits is 9797760, while the sum is 60.

It can be divided in two parts, 15249 and 806979, that added together give a palindrome (822228).

The spelling of 15249806979 in words is "fifteen billion, two hundred forty-nine million, eight hundred six thousand, nine hundred seventy-nine".