76720136256 has 105 divisors (see below), whose sum is σ = 227481650319. Its totient is φ = 25566731136.

The previous prime is 76720136203. The next prime is 76720136261. The reversal of 76720136256 is 65263102767.

The square root of 76720136256 is 276984.

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

76720136256 is a `hidden beast` number, since 7 + 6 + 7 + 2 + 0 + 13 + 625 + 6 = 666.

It is a super-3 number, since 3×76720136256³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 19940925 + ... + 19944771.

Almost surely, 2^76720136256 is an apocalyptic number.

76720136256 is the 276984-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76720136256

76720136256 is an abundant number, since it is smaller than the sum of its proper divisors (150761514063).

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

76720136256 is an frugal number, since it uses more digits than its factorization.

76720136256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718 (or 3852 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 76720136256 in words is "seventy-six billion, seven hundred twenty million, one hundred thirty-six thousand, two hundred fifty-six".