68715836865778 has 8 divisors (see below), whose sum is σ = 103234056630768. Its totient is φ = 34304484655524.

The previous prime is 68715836865761. The next prime is 68715836865791. The reversal of 68715836865778 is 87756863851786.

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

It is a junction number, because it is equal to n+sod(n) for n = 68715836865695 and 68715836865704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26716887076 + ... + 26716889647.

It is an arithmetic number, because the mean of its divisors is an integer number (12904257078846).

Almost surely, 2^{68715836865778} is an apocalyptic number.

68715836865778 is a deficient number, since it is larger than the sum of its proper divisors (34518219764990).

68715836865778 is a wasteful number, since it uses less digits than its factorization.

68715836865778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53433777368.

The product of its digits is 22759833600, while the sum is 85.

The spelling of 68715836865778 in words is "sixty-eight trillion, seven hundred fifteen billion, eight hundred thirty-six million, eight hundred sixty-five thousand, seven hundred seventy-eight".