64624573 has 8 divisors (see below), whose sum is σ = 69667416. Its totient is φ = 59592000.

The previous prime is 64624541. The next prime is 64624583. The reversal of 64624573 is 37542646.

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 64432729 = 438^2 + 8027^2 .

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

It is not a de Polignac number, because 64624573 - 2⁵ = 64624541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64624513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15003 + ... + 18823.

It is an arithmetic number, because the mean of its divisors is an integer number (8708427).

Almost surely, 2^64624573 is an apocalyptic number.

It is an amenable number.

64624573 is a deficient number, since it is larger than the sum of its proper divisors (5042843).

64624573 is a wasteful number, since it uses less digits than its factorization.

64624573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135.

The product of its digits is 120960, while the sum is 37.

The square root of 64624573 is about 8038.9410372262. The cubic root of 64624573 is about 401.2969837873.

The spelling of 64624573 in words is "sixty-four million, six hundred twenty-four thousand, five hundred seventy-three".