68713775947 has 2 divisors, whose sum is σ = 68713775948. Its totient is φ = 68713775946.

The previous prime is 68713775941. The next prime is 68713776029. The reversal of 68713775947 is 74957731786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68713775947 - 2³ = 68713775939 is a prime.

It is not a weakly prime, because it can be changed into another prime (68713775941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34356887973 + 34356887974.

It is an arithmetic number, because the mean of its divisors is an integer number (34356887974).

Almost surely, 2^68713775947 is an apocalyptic number.

68713775947 is a deficient number, since it is larger than the sum of its proper divisors (1).

68713775947 is an equidigital number, since it uses as much as digits as its factorization.

68713775947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62233920, while the sum is 64.

The spelling of 68713775947 in words is "sixty-eight billion, seven hundred thirteen million, seven hundred seventy-five thousand, nine hundred forty-seven".