68577258857 has 4 divisors (see below), whose sum is σ = 68586425856. Its totient is φ = 68568091860.

The previous prime is 68577258853. The next prime is 68577258889. The reversal of 68577258857 is 75885277586.

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 68577258857 - 2² = 68577258853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68577258853) 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, 4572269 + ... + 4587242.

It is an arithmetic number, because the mean of its divisors is an integer number (17146606464).

Almost surely, 2^68577258857 is an apocalyptic number.

It is an amenable number.

68577258857 is a deficient number, since it is larger than the sum of its proper divisors (9166999).

68577258857 is an equidigital number, since it uses as much as digits as its factorization.

68577258857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166998.

The product of its digits is 263424000, while the sum is 68.

The spelling of 68577258857 in words is "sixty-eight billion, five hundred seventy-seven million, two hundred fifty-eight thousand, eight hundred fifty-seven".