64636401 has 8 divisors (see below), whose sum is σ = 86236704. Its totient is φ = 43063520.

The previous prime is 64636399. The next prime is 64636427. The reversal of 64636401 is 10463646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64636401 - 2¹ = 64636399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64638401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516 + ... + 11381.

It is an arithmetic number, because the mean of its divisors is an integer number (10779588).

Almost surely, 2^64636401 is an apocalyptic number.

It is an amenable number.

64636401 is a deficient number, since it is larger than the sum of its proper divisors (21600303).

64636401 is a wasteful number, since it uses less digits than its factorization.

64636401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13711.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 64636401 is about 8039.6766726032. The cubic root of 64636401 is about 401.3214649352.

The spelling of 64636401 in words is "sixty-four million, six hundred thirty-six thousand, four hundred one".