64813853 has 16 divisors (see below), whose sum is σ = 71359680. Its totient is φ = 58506624.

The previous prime is 64813829. The next prime is 64813867. The reversal of 64813853 is 35831846.

It is a cyclic number.

It is not a de Polignac number, because 64813853 - 2⁶ = 64813789 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64813813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154478 + ... + 154896.

It is an arithmetic number, because the mean of its divisors is an integer number (4459980).

Almost surely, 2^64813853 is an apocalyptic number.

It is an amenable number.

64813853 is a deficient number, since it is larger than the sum of its proper divisors (6545827).

64813853 is a wasteful number, since it uses less digits than its factorization.

64813853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its digits is 69120, while the sum is 38.

The square root of 64813853 is about 8050.7051243975. The cubic root of 64813853 is about 401.6883904008.

The spelling of 64813853 in words is "sixty-four million, eight hundred thirteen thousand, eight hundred fifty-three".