64505601 has 6 divisors (see below), whose sum is σ = 93174770. Its totient is φ = 43003728.

The previous prime is 64505563. The next prime is 64505603. The reversal of 64505601 is 10650546.

It is a happy number.

64505601 is a `hidden beast` number, since 6 + 4 + 50 + 5 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 104976 = 8025^2 + 324^2 .

It is not a de Polignac number, because 64505601 - 2⁷ = 64505473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64505603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3583636 + ... + 3583653.

Almost surely, 2^64505601 is an apocalyptic number.

It is an amenable number.

64505601 is a deficient number, since it is larger than the sum of its proper divisors (28669169).

64505601 is a wasteful number, since it uses less digits than its factorization.

64505601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7167295 (or 7167292 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 64505601 is about 8031.5378975636. The cubic root of 64505601 is about 401.0505737380.

The spelling of 64505601 in words is "sixty-four million, five hundred five thousand, six hundred one".