76980881921 has 4 divisors (see below), whose sum is σ = 76983191472. Its totient is φ = 76978572372.

The previous prime is 76980881903. The next prime is 76980881927. The reversal of 76980881921 is 12918808967.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76980881921 - 2²² = 76976687617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76980881927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1104035 + ... + 1171688.

It is an arithmetic number, because the mean of its divisors is an integer number (19245797868).

Almost surely, 2^76980881921 is an apocalyptic number.

It is an amenable number.

76980881921 is a deficient number, since it is larger than the sum of its proper divisors (2309551).

76980881921 is a wasteful number, since it uses less digits than its factorization.

76980881921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309550.

The product of its (nonzero) digits is 3483648, while the sum is 59.

The spelling of 76980881921 in words is "seventy-six billion, nine hundred eighty million, eight hundred eighty-one thousand, nine hundred twenty-one".