64522567673 has 2 divisors, whose sum is σ = 64522567674. Its totient is φ = 64522567672.

The previous prime is 64522567649. The next prime is 64522567699. The reversal of 64522567673 is 37676522546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43625841424 + 20896726249 = 208868^2 + 144557^2 .

It is a cyclic number.

It is not a de Polignac number, because 64522567673 - 2¹² = 64522563577 is a prime.

It is not a weakly prime, because it can be changed into another prime (64522567633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32261283836 + 32261283837.

It is an arithmetic number, because the mean of its divisors is an integer number (32261283837).

Almost surely, 2^64522567673 is an apocalyptic number.

It is an amenable number.

64522567673 is a deficient number, since it is larger than the sum of its proper divisors (1).

64522567673 is an equidigital number, since it uses as much as digits as its factorization.

64522567673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12700800, while the sum is 53.

The spelling of 64522567673 in words is "sixty-four billion, five hundred twenty-two million, five hundred sixty-seven thousand, six hundred seventy-three".