64831605431 has 2 divisors, whose sum is σ = 64831605432. Its totient is φ = 64831605430.

The previous prime is 64831605427. The next prime is 64831605481. The reversal of 64831605431 is 13450613846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64831605431 - 2² = 64831605427 is a prime.

It is a super-2 number, since 2×64831605431² (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 (64831605481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32415802715 + 32415802716.

It is an arithmetic number, because the mean of its divisors is an integer number (32415802716).

Almost surely, 2^64831605431 is an apocalyptic number.

64831605431 is a deficient number, since it is larger than the sum of its proper divisors (1).

64831605431 is an equidigital number, since it uses as much as digits as its factorization.

64831605431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 64831605431 in words is "sixty-four billion, eight hundred thirty-one million, six hundred five thousand, four hundred thirty-one".