76802120639 has 4 divisors (see below), whose sum is σ = 77883840720. Its totient is φ = 75720400560.

The previous prime is 76802120621. The next prime is 76802120641. The reversal of 76802120639 is 93602120867.

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

It is a cyclic number.

It is not a de Polignac number, because 76802120639 - 2³⁶ = 8082643903 is a prime.

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 76802120639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76802120609) 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, 540859934 + ... + 540860075.

It is an arithmetic number, because the mean of its divisors is an integer number (19470960180).

Almost surely, 2^76802120639 is an apocalyptic number.

76802120639 is a deficient number, since it is larger than the sum of its proper divisors (1081720081).

76802120639 is a wasteful number, since it uses less digits than its factorization.

76802120639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081720080.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 76802120639 in words is "seventy-six billion, eight hundred two million, one hundred twenty thousand, six hundred thirty-nine".