68390680971 has 16 divisors (see below), whose sum is σ = 95419132704. Its totient is φ = 43524509184.

The previous prime is 68390680957. The next prime is 68390680993. The reversal of 68390680971 is 17908609386.

It is not a de Polignac number, because 68390680971 - 2⁹ = 68390680459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68390680951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5806686 + ... + 5818451.

It is an arithmetic number, because the mean of its divisors is an integer number (5963695794).

Almost surely, 2^68390680971 is an apocalyptic number.

68390680971 is a deficient number, since it is larger than the sum of its proper divisors (27028451733).

68390680971 is a wasteful number, since it uses less digits than its factorization.

68390680971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11625230.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 68390680971 in words is "sixty-eight billion, three hundred ninety million, six hundred eighty thousand, nine hundred seventy-one".