7996979136 has 112 divisors (see below), whose sum is σ = 21586342400. Its totient is φ = 2612293632.

The previous prime is 7996979113. The next prime is 7996979153. The reversal of 7996979136 is 6319796997.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

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, 2106456 + ... + 2110248.

It is an arithmetic number, because the mean of its divisors is an integer number (192735200).

Almost surely, 2^7996979136 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 7996979136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10793171200).

7996979136 is an abundant number, since it is smaller than the sum of its proper divisors (13589363264).

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

7996979136 is a wasteful number, since it uses less digits than its factorization.

7996979136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026 (or 4016 counting only the distinct ones).

The product of its digits is 34720812, while the sum is 66.

The square root of 7996979136 is about 89425.8303623735. The cubic root of 7996979136 is about 1999.7482296405.

The spelling of 7996979136 in words is "seven billion, nine hundred ninety-six million, nine hundred seventy-nine thousand, one hundred thirty-six".