76697979136 has 81 divisors (see below), whose sum is σ = 161755707603. Its totient is φ = 36290741760.

The previous prime is 76697979109. The next prime is 76697979139. The reversal of 76697979136 is 63197979667.

The square root of 76697979136 is 276944.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76697979139) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 84190521 + ... + 84191431.

Almost surely, 2^76697979136 is an apocalyptic number.

76697979136 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

76697979136 is the 276944-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76697979136

76697979136 is an abundant number, since it is smaller than the sum of its proper divisors (85057728467).

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

76697979136 is an frugal number, since it uses more digits than its factorization.

76697979136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 932 counting only the distinct ones).

The product of its digits is 162030456, while the sum is 70.

The spelling of 76697979136 in words is "seventy-six billion, six hundred ninety-seven million, nine hundred seventy-nine thousand, one hundred thirty-six".