64638801 has 6 divisors (see below), whose sum is σ = 93367170. Its totient is φ = 43092528.

The previous prime is 64638797. The next prime is 64638803. The reversal of 64638801 is 10883646.

It is a happy number.

64638801 is a `hidden beast` number, since 646 + 3 + 8 + 8 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39388176 + 25250625 = 6276^2 + 5025^2 .

It is not a de Polignac number, because 64638801 - 2² = 64638797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64638803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3591036 + ... + 3591053.

It is an arithmetic number, because the mean of its divisors is an integer number (15561195).

Almost surely, 2^64638801 is an apocalyptic number.

It is an amenable number.

64638801 is a deficient number, since it is larger than the sum of its proper divisors (28728369).

64638801 is a wasteful number, since it uses less digits than its factorization.

64638801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182095 (or 7182092 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64638801 is about 8039.8259309515. The cubic root of 64638801 is about 401.3264320001.

The spelling of 64638801 in words is "sixty-four million, six hundred thirty-eight thousand, eight hundred one".