79881512 has 16 divisors (see below), whose sum is σ = 150141600. Its totient is φ = 39843760.

The previous prime is 79881509. The next prime is 79881517. The reversal of 79881512 is 21518897.

It is a super-2 number, since 2×79881512² = 12762111918812288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79881512.

It is not an unprimeable number, because it can be changed into a prime (79881517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564 + ... + 15267.

It is an arithmetic number, because the mean of its divisors is an integer number (9383850).

Almost surely, 2^79881512 is an apocalyptic number.

It is an amenable number.

79881512 is a deficient number, since it is larger than the sum of its proper divisors (70260088).

79881512 is a wasteful number, since it uses less digits than its factorization.

79881512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24256 (or 24252 counting only the distinct ones).

The product of its digits is 40320, while the sum is 41.

The square root of 79881512 is about 8937.6457750349. The cubic root of 79881512 is about 430.6741040143.

The spelling of 79881512 in words is "seventy-nine million, eight hundred eighty-one thousand, five hundred twelve".