64578013 has 8 divisors (see below), whose sum is σ = 65415168. Its totient is φ = 63745104.

The previous prime is 64578011. The next prime is 64578029. The reversal of 64578013 is 31087546.

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 64578013 - 2¹ = 64578011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64578013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64578011) 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, 38631 + ... + 40267.

It is an arithmetic number, because the mean of its divisors is an integer number (8176896).

Almost surely, 2^64578013 is an apocalyptic number.

It is an amenable number.

64578013 is a deficient number, since it is larger than the sum of its proper divisors (837155).

64578013 is a wasteful number, since it uses less digits than its factorization.

64578013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 64578013 is about 8036.0446116233. The cubic root of 64578013 is about 401.2005866241.

The spelling of 64578013 in words is "sixty-four million, five hundred seventy-eight thousand, thirteen".