77930586565 has 8 divisors (see below), whose sum is σ = 100710296568. Its totient is φ = 57548740800.

The previous prime is 77930586529. The next prime is 77930586571. The reversal of 77930586565 is 56568503977.

It can be written as a sum of positive squares in 4 ways, for example, as 4184666721 + 73745919844 = 64689^2 + 271562^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77930586565 - 2¹¹ = 77930584517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599465986 + ... + 599466115.

It is an arithmetic number, because the mean of its divisors is an integer number (12588787071).

Almost surely, 2^77930586565 is an apocalyptic number.

It is an amenable number.

77930586565 is a deficient number, since it is larger than the sum of its proper divisors (22779710003).

77930586565 is a wasteful number, since it uses less digits than its factorization.

77930586565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198932119.

The product of its (nonzero) digits is 47628000, while the sum is 61.

The spelling of 77930586565 in words is "seventy-seven billion, nine hundred thirty million, five hundred eighty-six thousand, five hundred sixty-five".