64718999959 has 2 divisors, whose sum is σ = 64718999960. Its totient is φ = 64718999958.

The previous prime is 64718999951. The next prime is 64719000023. The reversal of 64718999959 is 95999981746.

64718999959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64718999959 - 2³ = 64718999951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64718999951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32359499979 + 32359499980.

It is an arithmetic number, because the mean of its divisors is an integer number (32359499980).

Almost surely, 2^64718999959 is an apocalyptic number.

64718999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

64718999959 is an equidigital number, since it uses as much as digits as its factorization.

64718999959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396809280, while the sum is 76.

The spelling of 64718999959 in words is "sixty-four billion, seven hundred eighteen million, nine hundred ninety-nine thousand, nine hundred fifty-nine".