77696023521 has 8 divisors (see below), whose sum is σ = 104115275200. Its totient is φ = 51537060432.

The previous prime is 77696023507. The next prime is 77696023529. The reversal of 77696023521 is 12532069677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77696023521 - 2¹⁰ = 77696022497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77696023529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65071450 + ... + 65072643.

It is an arithmetic number, because the mean of its divisors is an integer number (13014409400).

Almost surely, 2^77696023521 is an apocalyptic number.

It is an amenable number.

77696023521 is a deficient number, since it is larger than the sum of its proper divisors (26419251679).

77696023521 is a wasteful number, since it uses less digits than its factorization.

77696023521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130144295.

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 77696023521 in words is "seventy-seven billion, six hundred ninety-six million, twenty-three thousand, five hundred twenty-one".