64531440199 has 2 divisors, whose sum is σ = 64531440200. Its totient is φ = 64531440198.

The previous prime is 64531440187. The next prime is 64531440227. The reversal of 64531440199 is 99104413546.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64531440199 is a prime.

It is a super-2 number, since 2×64531440199² (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 (64531440119) 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, 32265720099 + 32265720100.

It is an arithmetic number, because the mean of its divisors is an integer number (32265720100).

Almost surely, 2^64531440199 is an apocalyptic number.

64531440199 is a deficient number, since it is larger than the sum of its proper divisors (1).

64531440199 is an equidigital number, since it uses as much as digits as its factorization.

64531440199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 64531440199 in words is "sixty-four billion, five hundred thirty-one million, four hundred forty thousand, one hundred ninety-nine".