77138132399 has 4 divisors (see below), whose sum is σ = 78224585040. Its totient is φ = 76051679760.

The previous prime is 77138132339. The next prime is 77138132447. The reversal of 77138132399 is 99323183177.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77138132399 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 77138132399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77138132339) 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, 543226214 + ... + 543226355.

It is an arithmetic number, because the mean of its divisors is an integer number (19556146260).

Almost surely, 2^77138132399 is an apocalyptic number.

77138132399 is a deficient number, since it is larger than the sum of its proper divisors (1086452641).

77138132399 is a wasteful number, since it uses less digits than its factorization.

77138132399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086452640.

The product of its digits is 1714608, while the sum is 53.

The spelling of 77138132399 in words is "seventy-seven billion, one hundred thirty-eight million, one hundred thirty-two thousand, three hundred ninety-nine".