64472505 has 32 divisors (see below), whose sum is σ = 105821184. Its totient is φ = 33509376.

The previous prime is 64472503. The next prime is 64472533. The reversal of 64472505 is 50527446.

It is not a de Polignac number, because 64472505 - 2¹ = 64472503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64472501) 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 31 ways as a sum of consecutive naturals, for example, 105912 + ... + 106518.

It is an arithmetic number, because the mean of its divisors is an integer number (3306912).

Almost surely, 2^64472505 is an apocalyptic number.

It is an amenable number.

64472505 is a deficient number, since it is larger than the sum of its proper divisors (41348679).

64472505 is a wasteful number, since it uses less digits than its factorization.

64472505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 64472505 is about 8029.4772557122. The cubic root of 64472505 is about 400.9819727677.

The spelling of 64472505 in words is "sixty-four million, four hundred seventy-two thousand, five hundred five".