64189815773 has 2 divisors, whose sum is σ = 64189815774. Its totient is φ = 64189815772.

The previous prime is 64189815743. The next prime is 64189815787. The reversal of 64189815773 is 37751898146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59086427929 + 5103387844 = 243077^2 + 71438^2 .

It is a cyclic number.

It is not a de Polignac number, because 64189815773 - 2¹⁰ = 64189814749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64189815713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32094907886 + 32094907887.

It is an arithmetic number, because the mean of its divisors is an integer number (32094907887).

Almost surely, 2^64189815773 is an apocalyptic number.

It is an amenable number.

64189815773 is a deficient number, since it is larger than the sum of its proper divisors (1).

64189815773 is an equidigital number, since it uses as much as digits as its factorization.

64189815773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 59.

The spelling of 64189815773 in words is "sixty-four billion, one hundred eighty-nine million, eight hundred fifteen thousand, seven hundred seventy-three".