64854238198199 has 2 divisors, whose sum is σ = 64854238198200. Its totient is φ = 64854238198198.

The previous prime is 64854238198187. The next prime is 64854238198289. The reversal of 64854238198199 is 99189183245846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64854238198199 - 2³⁶ = 64785518721463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64854238194199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32427119099099 + 32427119099100.

It is an arithmetic number, because the mean of its divisors is an integer number (32427119099100).

Almost surely, 2^{64854238198199} is an apocalyptic number.

64854238198199 is a deficient number, since it is larger than the sum of its proper divisors (1).

64854238198199 is an equidigital number, since it uses as much as digits as its factorization.

64854238198199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1074954240, while the sum is 77.

The spelling of 64854238198199 in words is "sixty-four trillion, eight hundred fifty-four billion, two hundred thirty-eight million, one hundred ninety-eight thousand, one hundred ninety-nine".