65319918031 has 2 divisors, whose sum is σ = 65319918032. Its totient is φ = 65319918030.

The previous prime is 65319917987. The next prime is 65319918047. The reversal of 65319918031 is 13081991356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65319918031 - 2⁷ = 65319917903 is a prime.

It is a super-2 number, since 2×65319918031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65319910031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32659959015 + 32659959016.

It is an arithmetic number, because the mean of its divisors is an integer number (32659959016).

Almost surely, 2^65319918031 is an apocalyptic number.

65319918031 is a deficient number, since it is larger than the sum of its proper divisors (1).

65319918031 is an equidigital number, since it uses as much as digits as its factorization.

65319918031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 65319918031 in words is "sixty-five billion, three hundred nineteen million, nine hundred eighteen thousand, thirty-one".