5078864778657 has 4 divisors (see below), whose sum is σ = 6771819704880. Its totient is φ = 3385909852436.

The previous prime is 5078864778593. The next prime is 5078864778671. The reversal of 5078864778657 is 7568774688705.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5078864778657 - 2⁶ = 5078864778593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5078864778677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846477463107 + ... + 846477463112.

It is an arithmetic number, because the mean of its divisors is an integer number (1692954926220).

Almost surely, 2^{5078864778657} is an apocalyptic number.

It is an amenable number.

5078864778657 is a deficient number, since it is larger than the sum of its proper divisors (1692954926223).

5078864778657 is a wasteful number, since it uses less digits than its factorization.

5078864778657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692954926222.

The product of its (nonzero) digits is 4425523200, while the sum is 78.

The spelling of 5078864778657 in words is "five trillion, seventy-eight billion, eight hundred sixty-four million, seven hundred seventy-eight thousand, six hundred fifty-seven".