78579292865 has 8 divisors (see below), whose sum is σ = 99841925160. Its totient is φ = 59165585152.

The previous prime is 78579292861. The next prime is 78579292919. The reversal of 78579292865 is 56829297587.

It can be written as a sum of positive squares in 4 ways, for example, as 26602588609 + 51976704256 = 163103^2 + 227984^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78579292865 - 2² = 78579292861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78579292795 and 78579292804.

It is not an unprimeable number, because it can be changed into a prime (78579292861) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 462231050 + ... + 462231219.

It is an arithmetic number, because the mean of its divisors is an integer number (12480240645).

Almost surely, 2^78579292865 is an apocalyptic number.

It is an amenable number.

78579292865 is a deficient number, since it is larger than the sum of its proper divisors (21262632295).

78579292865 is a wasteful number, since it uses less digits than its factorization.

78579292865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924462291.

The product of its digits is 152409600, while the sum is 68.

The spelling of 78579292865 in words is "seventy-eight billion, five hundred seventy-nine million, two hundred ninety-two thousand, eight hundred sixty-five".