64194959522689 has 2 divisors, whose sum is σ = 64194959522690. Its totient is φ = 64194959522688.

The previous prime is 64194959522647. The next prime is 64194959522711. The reversal of 64194959522689 is 98622595949146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59199251751025 + 4995707771664 = 7694105^2 + 2235108^2 .

It is a cyclic number.

It is not a de Polignac number, because 64194959522689 - 2²³ = 64194951134081 is a prime.

It is not a weakly prime, because it can be changed into another prime (64194959522609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32097479761344 + 32097479761345.

It is an arithmetic number, because the mean of its divisors is an integer number (32097479761345).

Almost surely, 2^{64194959522689} is an apocalyptic number.

It is an amenable number.

64194959522689 is a deficient number, since it is larger than the sum of its proper divisors (1).

64194959522689 is an equidigital number, since it uses as much as digits as its factorization.

64194959522689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3023308800, while the sum is 79.

The spelling of 64194959522689 in words is "sixty-four trillion, one hundred ninety-four billion, nine hundred fifty-nine million, five hundred twenty-two thousand, six hundred eighty-nine".