64642807 has 16 divisors (see below), whose sum is σ = 69552000. Its totient is φ = 59901984.

The previous prime is 64642771. The next prime is 64642829. The reversal of 64642807 is 70824646.

It is not a de Polignac number, because 64642807 - 2⁷ = 64642679 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 (64642307) 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, 282169 + ... + 282397.

It is an arithmetic number, because the mean of its divisors is an integer number (4347000).

Almost surely, 2^64642807 is an apocalyptic number.

64642807 is a deficient number, since it is larger than the sum of its proper divisors (4909193).

64642807 is a wasteful number, since it uses less digits than its factorization.

64642807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 64642807 is about 8040.0750618387. The cubic root of 64642807 is about 401.3347225853.

The spelling of 64642807 in words is "sixty-four million, six hundred forty-two thousand, eight hundred seven".