64885577 has 2 divisors, whose sum is σ = 64885578. Its totient is φ = 64885576.

The previous prime is 64885559. The next prime is 64885609. The reversal of 64885577 is 77558846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59428681 + 5456896 = 7709^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 64885577 - 2¹⁰ = 64884553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64885537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32442788 + 32442789.

It is an arithmetic number, because the mean of its divisors is an integer number (32442789).

Almost surely, 2^64885577 is an apocalyptic number.

It is an amenable number.

64885577 is a deficient number, since it is larger than the sum of its proper divisors (1).

64885577 is an equidigital number, since it uses as much as digits as its factorization.

64885577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881600, while the sum is 50.

The square root of 64885577 is about 8055.1584093673. The cubic root of 64885577 is about 401.8365072815.

The spelling of 64885577 in words is "sixty-four million, eight hundred eighty-five thousand, five hundred seventy-seven".