68354331961 has 16 divisors (see below), whose sum is σ = 73641568000. Its totient is φ = 63236729808.

The previous prime is 68354331937. The next prime is 68354332019. The reversal of 68354331961 is 16913345386.

It is a cyclic number.

It is not a de Polignac number, because 68354331961 - 2⁹ = 68354331449 is a prime.

It is a super-2 number, since 2×68354331961² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68354331161) 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, 6284650 + ... + 6295516.

It is an arithmetic number, because the mean of its divisors is an integer number (4602598000).

Almost surely, 2^68354331961 is an apocalyptic number.

It is an amenable number.

68354331961 is a deficient number, since it is larger than the sum of its proper divisors (5287236039).

68354331961 is a wasteful number, since it uses less digits than its factorization.

68354331961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18628.

The product of its digits is 1399680, while the sum is 49.

The spelling of 68354331961 in words is "sixty-eight billion, three hundred fifty-four million, three hundred thirty-one thousand, nine hundred sixty-one".