68211406931 has 16 divisors (see below), whose sum is σ = 71945798400. Its totient is φ = 64491616800.

The previous prime is 68211406909. The next prime is 68211406961. The reversal of 68211406931 is 13960411286.

It is a cyclic number.

It is not a de Polignac number, because 68211406931 - 2²² = 68207212627 is a prime.

It is a super-2 number, since 2×68211406931² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68211406961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33617225 + ... + 33619253.

It is an arithmetic number, because the mean of its divisors is an integer number (4496612400).

Almost surely, 2^68211406931 is an apocalyptic number.

68211406931 is a deficient number, since it is larger than the sum of its proper divisors (3734391469).

68211406931 is a wasteful number, since it uses less digits than its factorization.

68211406931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 68211406931 in words is "sixty-eight billion, two hundred eleven million, four hundred six thousand, nine hundred thirty-one".