77522765487 has 4 divisors (see below), whose sum is σ = 103363687320. Its totient is φ = 51681843656.

The previous prime is 77522765479. The next prime is 77522765503. The reversal of 77522765487 is 78456722577.

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 77522765487 - 2³ = 77522765479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77522765487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77522725487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12920460912 + ... + 12920460917.

It is an arithmetic number, because the mean of its divisors is an integer number (25840921830).

Almost surely, 2^77522765487 is an apocalyptic number.

77522765487 is a deficient number, since it is larger than the sum of its proper divisors (25840921833).

77522765487 is a wasteful number, since it uses less digits than its factorization.

77522765487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25840921832.

The product of its digits is 46099200, while the sum is 60.

The spelling of 77522765487 in words is "seventy-seven billion, five hundred twenty-two million, seven hundred sixty-five thousand, four hundred eighty-seven".