640089045 has 12 divisors (see below), whose sum is σ = 1109487756. Its totient is φ = 341380800.

The previous prime is 640089029. The next prime is 640089059. The reversal of 640089045 is 540980046.

640089045 is a `hidden beast` number, since 640 + 0 + 8 + 9 + 0 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 300571569 + 339517476 = 17337^2 + 18426^2 .

It is not a de Polignac number, because 640089045 - 2⁴ = 640089029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7112056 + ... + 7112145.

It is an arithmetic number, because the mean of its divisors is an integer number (92457313).

Almost surely, 2^640089045 is an apocalyptic number.

It is an amenable number.

640089045 is a deficient number, since it is larger than the sum of its proper divisors (469398711).

640089045 is a wasteful number, since it uses less digits than its factorization.

640089045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14224212 (or 14224209 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 640089045 is about 25299.9811264752. The cubic root of 640089045 is about 861.8138411670.

The spelling of 640089045 in words is "six hundred forty million, eighty-nine thousand, forty-five".