78504851713864 has 32 divisors (see below), whose sum is σ = 150808722232320. Its totient is φ = 38294528927616.

The previous prime is 78504851713819. The next prime is 78504851713901. The reversal of 78504851713864 is 46831715840587.

It is a self number, because there is not a number n which added to its sum of digits gives 78504851713864.

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, 333411864 + ... + 333647239.

It is an arithmetic number, because the mean of its divisors is an integer number (4712772569760).

Almost surely, 2^{78504851713864} is an apocalyptic number.

It is an amenable number.

78504851713864 is a deficient number, since it is larger than the sum of its proper divisors (72303870518456).

78504851713864 is a wasteful number, since it uses less digits than its factorization.

78504851713864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667059469 (or 667059465 counting only the distinct ones).

The product of its (nonzero) digits is 180633600, while the sum is 67.

The spelling of 78504851713864 in words is "seventy-eight trillion, five hundred four billion, eight hundred fifty-one million, seven hundred thirteen thousand, eight hundred sixty-four".