77865000715 has 4 divisors (see below), whose sum is σ = 93438000864. Its totient is φ = 62292000568.

The previous prime is 77865000683. The next prime is 77865000779. The reversal of 77865000715 is 51700056877.

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 77865000715 - 2⁵ = 77865000683 is a prime.

It is a super-2 number, since 2×77865000715² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7786500067 + ... + 7786500076.

It is an arithmetic number, because the mean of its divisors is an integer number (23359500216).

Almost surely, 2^77865000715 is an apocalyptic number.

77865000715 is a deficient number, since it is larger than the sum of its proper divisors (15573000149).

77865000715 is a wasteful number, since it uses less digits than its factorization.

77865000715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15573000148.

The product of its (nonzero) digits is 411600, while the sum is 46.

The spelling of 77865000715 in words is "seventy-seven billion, eight hundred sixty-five million, seven hundred fifteen", and thus it is an aban number.