64960207861 has 2 divisors, whose sum is σ = 64960207862. Its totient is φ = 64960207860.

The previous prime is 64960207817. The next prime is 64960207913. The reversal of 64960207861 is 16870206946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37745106961 + 27215100900 = 194281^2 + 164970^2 .

It is a cyclic number.

It is not a de Polignac number, because 64960207861 - 2²³ = 64951819253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64960207811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32480103930 + 32480103931.

It is an arithmetic number, because the mean of its divisors is an integer number (32480103931).

Almost surely, 2^64960207861 is an apocalyptic number.

It is an amenable number.

64960207861 is a deficient number, since it is larger than the sum of its proper divisors (1).

64960207861 is an equidigital number, since it uses as much as digits as its factorization.

64960207861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 64960207861 in words is "sixty-four billion, nine hundred sixty million, two hundred seven thousand, eight hundred sixty-one".