68719476731 has 2 divisors, whose sum is σ = 68719476732. Its totient is φ = 68719476730.

The previous prime is 68719476719. The next prime is 68719476767. The reversal of 68719476731 is 13767491786.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68719476731 - 2¹⁰ = 68719475707 is a prime.

It is a super-2 number, since 2×68719476731² (a number of 22 digits) contains 22 as substring.

It is a nialpdrome in base 8 and base 16.

It is not a weakly prime, because it can be changed into another prime (68719475731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34359738365 + 34359738366.

It is an arithmetic number, because the mean of its divisors is an integer number (34359738366).

Almost surely, 2^68719476731 is an apocalyptic number.

68719476731 is a deficient number, since it is larger than the sum of its proper divisors (1).

68719476731 is an equidigital number, since it uses as much as digits as its factorization.

68719476731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 59.

The spelling of 68719476731 in words is "sixty-eight billion, seven hundred nineteen million, four hundred seventy-six thousand, seven hundred thirty-one".