64476013 has 6 divisors (see below), whose sum is σ = 75002766. Its totient is φ = 55265112.

The previous prime is 64476011. The next prime is 64476017. The reversal of 64476013 is 31067446.

It can be written as a sum of positive squares in only one way, i.e., 62125924 + 2350089 = 7882^2 + 1533^2 .

It is not a de Polignac number, because 64476013 - 2¹ = 64476011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64476011) 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, 657870 + ... + 657967.

It is an arithmetic number, because the mean of its divisors is an integer number (12500461).

Almost surely, 2^64476013 is an apocalyptic number.

It is an amenable number.

64476013 is a deficient number, since it is larger than the sum of its proper divisors (10526753).

64476013 is a wasteful number, since it uses less digits than its factorization.

64476013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315851 (or 1315844 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 64476013 is about 8029.6956978456. The cubic root of 64476013 is about 400.9892452179.

The spelling of 64476013 in words is "sixty-four million, four hundred seventy-six thousand, thirteen".