68656892397 has 4 divisors (see below), whose sum is σ = 91542523200. Its totient is φ = 45771261596.

The previous prime is 68656892389. The next prime is 68656892399. The reversal of 68656892397 is 79329865686.

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 68656892397 - 2³ = 68656892389 is a prime.

It is a super-2 number, since 2×68656892397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68656892399) 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, 11442815397 + ... + 11442815402.

It is an arithmetic number, because the mean of its divisors is an integer number (22885630800).

Almost surely, 2^68656892397 is an apocalyptic number.

It is an amenable number.

68656892397 is a deficient number, since it is larger than the sum of its proper divisors (22885630803).

68656892397 is a wasteful number, since it uses less digits than its factorization.

68656892397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22885630802.

The product of its digits is 235146240, while the sum is 69.

The spelling of 68656892397 in words is "sixty-eight billion, six hundred fifty-six million, eight hundred ninety-two thousand, three hundred ninety-seven".