15449089931 has 32 divisors (see below), whose sum is σ = 17589312000. Its totient is φ = 13440743680.

The previous prime is 15449089919. The next prime is 15449089933. The reversal of 15449089931 is 13998094451.

It is not a de Polignac number, because 15449089931 - 2³⁰ = 14375348107 is a prime.

It is a super-2 number, since 2×15449089931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15449089933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25791170 + ... + 25791768.

It is an arithmetic number, because the mean of its divisors is an integer number (549666000).

Almost surely, 2^15449089931 is an apocalyptic number.

15449089931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15449089931 is a deficient number, since it is larger than the sum of its proper divisors (2140222069).

15449089931 is a wasteful number, since it uses less digits than its factorization.

15449089931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 15449089931 in words is "fifteen billion, four hundred forty-nine million, eighty-nine thousand, nine hundred thirty-one".