68047521031 has 6 divisors (see below), whose sum is σ = 79157320440. Its totient is φ = 58326446556.

The previous prime is 68047520971. The next prime is 68047521077. The reversal of 68047521031 is 13012574086.

It is not a de Polignac number, because 68047521031 - 2¹¹ = 68047518983 is a prime.

It is a super-2 number, since 2×68047521031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68047521331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 694362411 + ... + 694362508.

It is an arithmetic number, because the mean of its divisors is an integer number (13192886740).

Almost surely, 2^68047521031 is an apocalyptic number.

68047521031 is a deficient number, since it is larger than the sum of its proper divisors (11109799409).

68047521031 is a wasteful number, since it uses less digits than its factorization.

68047521031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388724933 (or 1388724926 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 68047521031 in words is "sixty-eight billion, forty-seven million, five hundred twenty-one thousand, thirty-one".