68951909631 has 16 divisors (see below), whose sum is σ = 102186023040. Its totient is φ = 41000562720.

The previous prime is 68951909627. The next prime is 68951909641. The reversal of 68951909631 is 13690915986.

It is not a de Polignac number, because 68951909631 - 2² = 68951909627 is a prime.

It is a super-2 number, since 2×68951909631² (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 (68951909641) 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, 19710061 + ... + 19713558.

It is an arithmetic number, because the mean of its divisors is an integer number (6386626440).

Almost surely, 2^68951909631 is an apocalyptic number.

68951909631 is a deficient number, since it is larger than the sum of its proper divisors (33234113409).

68951909631 is a wasteful number, since it uses less digits than its factorization.

68951909631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39423686.

The product of its (nonzero) digits is 3149280, while the sum is 57.

The spelling of 68951909631 in words is "sixty-eight billion, nine hundred fifty-one million, nine hundred nine thousand, six hundred thirty-one".