64789493831 has 2 divisors, whose sum is σ = 64789493832. Its totient is φ = 64789493830.

The previous prime is 64789493809. The next prime is 64789493861. The reversal of 64789493831 is 13839498746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64789493831 is a prime.

It is a super-2 number, since 2×64789493831² (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 (64789493861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32394746915 + 32394746916.

It is an arithmetic number, because the mean of its divisors is an integer number (32394746916).

Almost surely, 2^64789493831 is an apocalyptic number.

64789493831 is a deficient number, since it is larger than the sum of its proper divisors (1).

64789493831 is an equidigital number, since it uses as much as digits as its factorization.

64789493831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 62.

The spelling of 64789493831 in words is "sixty-four billion, seven hundred eighty-nine million, four hundred ninety-three thousand, eight hundred thirty-one".