64189799293 has 2 divisors, whose sum is σ = 64189799294. Its totient is φ = 64189799292.

The previous prime is 64189799279. The next prime is 64189799309. The reversal of 64189799293 is 39299798146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40683696804 + 23506102489 = 201702^2 + 153317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64189799293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64189799203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32094899646 + 32094899647.

It is an arithmetic number, because the mean of its divisors is an integer number (32094899647).

Almost surely, 2^64189799293 is an apocalyptic number.

It is an amenable number.

64189799293 is a deficient number, since it is larger than the sum of its proper divisors (1).

64189799293 is an equidigital number, since it uses as much as digits as its factorization.

64189799293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 67.

The spelling of 64189799293 in words is "sixty-four billion, one hundred eighty-nine million, seven hundred ninety-nine thousand, two hundred ninety-three".