64430448431 has 2 divisors, whose sum is σ = 64430448432. Its totient is φ = 64430448430.

The previous prime is 64430448377. The next prime is 64430448449. The reversal of 64430448431 is 13484403446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64430448431 - 2²² = 64426254127 is a prime.

It is a super-2 number, since 2×64430448431² (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 (64430448451) 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, 32215224215 + 32215224216.

It is an arithmetic number, because the mean of its divisors is an integer number (32215224216).

Almost surely, 2^64430448431 is an apocalyptic number.

64430448431 is a deficient number, since it is larger than the sum of its proper divisors (1).

64430448431 is an equidigital number, since it uses as much as digits as its factorization.

64430448431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442368, while the sum is 41.

The spelling of 64430448431 in words is "sixty-four billion, four hundred thirty million, four hundred forty-eight thousand, four hundred thirty-one".