64172317031 has 2 divisors, whose sum is σ = 64172317032. Its totient is φ = 64172317030.

The previous prime is 64172317019. The next prime is 64172317091. The reversal of 64172317031 is 13071327146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64172317031 - 2³⁴ = 46992447847 is a prime.

It is a super-2 number, since 2×64172317031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64172316982 and 64172317000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64172317091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32086158515 + 32086158516.

It is an arithmetic number, because the mean of its divisors is an integer number (32086158516).

Almost surely, 2^64172317031 is an apocalyptic number.

64172317031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64172317031 is an equidigital number, since it uses as much as digits as its factorization.

64172317031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 64172317031 in words is "sixty-four billion, one hundred seventy-two million, three hundred seventeen thousand, thirty-one".