76021609939 has 4 divisors (see below), whose sum is σ = 82932665400. Its totient is φ = 69110554480.

The previous prime is 76021609933. The next prime is 76021609991. The reversal of 76021609939 is 93990612067.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 76021609939 - 2⁹ = 76021609427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76021609933) 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, 3455527714 + ... + 3455527735.

It is an arithmetic number, because the mean of its divisors is an integer number (20733166350).

Almost surely, 2^76021609939 is an apocalyptic number.

76021609939 is a deficient number, since it is larger than the sum of its proper divisors (6911055461).

76021609939 is a wasteful number, since it uses less digits than its factorization.

76021609939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911055460.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 76021609939 in words is "seventy-six billion, twenty-one million, six hundred nine thousand, nine hundred thirty-nine".