79681536 has 192 divisors, whose sum is σ = 259459200. Its totient is φ = 23961600.

The previous prime is 79681519. The next prime is 79681583. The reversal of 79681536 is 63518697.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 79681491 and 79681500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608191 + ... + 608321.

It is an arithmetic number, because the mean of its divisors is an integer number (1351350).

Almost surely, 2^79681536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79681536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129729600).

79681536 is an abundant number, since it is smaller than the sum of its proper divisors (179777664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79681536 is a wasteful number, since it uses less digits than its factorization.

79681536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 147 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 79681536 is about 8926.4514786112. The cubic root of 79681536 is about 430.3144193980.

The spelling of 79681536 in words is "seventy-nine million, six hundred eighty-one thousand, five hundred thirty-six".