76615587774921 has 8 divisors (see below), whose sum is σ = 110012126035840. Its totient is φ = 47148054015312.

The previous prime is 76615587774917. The next prime is 76615587774931. The reversal of 76615587774921 is 12947778551667.

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

It is not a de Polignac number, because 76615587774921 - 2² = 76615587774917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76615587774911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982251125281 + ... + 982251125358.

It is an arithmetic number, because the mean of its divisors is an integer number (13751515754480).

Almost surely, 2^{76615587774921} is an apocalyptic number.

It is an amenable number.

76615587774921 is a deficient number, since it is larger than the sum of its proper divisors (33396538260919).

76615587774921 is a wasteful number, since it uses less digits than its factorization.

76615587774921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964502250655.

The product of its digits is 1244678400, while the sum is 75.

The spelling of 76615587774921 in words is "seventy-six trillion, six hundred fifteen billion, five hundred eighty-seven million, seven hundred seventy-four thousand, nine hundred twenty-one".