76312513821 has 8 divisors (see below), whose sum is σ = 101780578144. Its totient is φ = 50859729360.

The previous prime is 76312513813. The next prime is 76312513897. The reversal of 76312513821 is 12831521367.

It is a happy number.

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

It is not a de Polignac number, because 76312513821 - 2³ = 76312513813 is a prime.

It is a super-3 number, since 3×76312513821³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76312513821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76312513421) 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, 3808306 + ... + 3828291.

It is an arithmetic number, because the mean of its divisors is an integer number (12722572268).

Almost surely, 2^76312513821 is an apocalyptic number.

It is an amenable number.

76312513821 is a deficient number, since it is larger than the sum of its proper divisors (25468064323).

76312513821 is a wasteful number, since it uses less digits than its factorization.

76312513821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7639931.

The product of its digits is 60480, while the sum is 39.

The spelling of 76312513821 in words is "seventy-six billion, three hundred twelve million, five hundred thirteen thousand, eight hundred twenty-one".