64470813 has 16 divisors (see below), whose sum is σ = 93920256. Its totient is φ = 39013040.

The previous prime is 64470787. The next prime is 64470821. The reversal of 64470813 is 31807446.

It is not a de Polignac number, because 64470813 - 2²⁵ = 30916381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64470823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30220 + ... + 32282.

It is an arithmetic number, because the mean of its divisors is an integer number (5870016).

Almost surely, 2^64470813 is an apocalyptic number.

It is an amenable number.

64470813 is a deficient number, since it is larger than the sum of its proper divisors (29449443).

64470813 is a wasteful number, since it uses less digits than its factorization.

64470813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 64470813 is about 8029.3718932430. The cubic root of 64470813 is about 400.9784649808.

The spelling of 64470813 in words is "sixty-four million, four hundred seventy thousand, eight hundred thirteen".