64654577189 has 2 divisors, whose sum is σ = 64654577190. Its totient is φ = 64654577188.

The previous prime is 64654577173. The next prime is 64654577341. The reversal of 64654577189 is 98177545646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45856796164 + 18797781025 = 214142^2 + 137105^2 .

It is a cyclic number.

It is not a de Polignac number, because 64654577189 - 2⁴ = 64654577173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64654577149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32327288594 + 32327288595.

It is an arithmetic number, because the mean of its divisors is an integer number (32327288595).

Almost surely, 2^64654577189 is an apocalyptic number.

It is an amenable number.

64654577189 is a deficient number, since it is larger than the sum of its proper divisors (1).

64654577189 is an equidigital number, since it uses as much as digits as its factorization.

64654577189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50803200, while the sum is 62.

The spelling of 64654577189 in words is "sixty-four billion, six hundred fifty-four million, five hundred seventy-seven thousand, one hundred eighty-nine".