76613776421 has 16 divisors (see below), whose sum is σ = 94709295744. Its totient is φ = 60350439744.

The previous prime is 76613776391. The next prime is 76613776487. The reversal of 76613776421 is 12467731667.

It is not a de Polignac number, because 76613776421 - 2⁶ = 76613776357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76613776421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76613776321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1833770 + ... + 1875083.

It is an arithmetic number, because the mean of its divisors is an integer number (5919330984).

Almost surely, 2^76613776421 is an apocalyptic number.

It is an amenable number.

76613776421 is a deficient number, since it is larger than the sum of its proper divisors (18095519323).

76613776421 is a wasteful number, since it uses less digits than its factorization.

76613776421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709100.

The product of its digits is 1778112, while the sum is 50.

The spelling of 76613776421 in words is "seventy-six billion, six hundred thirteen million, seven hundred seventy-six thousand, four hundred twenty-one".