76943205621 has 24 divisors (see below), whose sum is σ = 115777925120. Its totient is φ = 49185338400.

The previous prime is 76943205593. The next prime is 76943205629. The reversal of 76943205621 is 12650234967.

76943205621 is a `hidden beast` number, since 7 + 69 + 4 + 3 + 20 + 562 + 1 = 666.

It is not a de Polignac number, because 76943205621 - 2⁶ = 76943205557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76943205629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234645 + ... + 1295466.

Almost surely, 2^76943205621 is an apocalyptic number.

It is an amenable number.

76943205621 is a deficient number, since it is larger than the sum of its proper divisors (38834719499).

76943205621 is a wasteful number, since it uses less digits than its factorization.

76943205621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530257 (or 2530254 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 76943205621 in words is "seventy-six billion, nine hundred forty-three million, two hundred five thousand, six hundred twenty-one".