640576416 has 24 divisors (see below), whose sum is σ = 1681513344. Its totient is φ = 213525440.

The previous prime is 640576411. The next prime is 640576463. The reversal of 640576416 is 614675046.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (640576411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336240 + ... + 3336431.

It is an arithmetic number, because the mean of its divisors is an integer number (70063056).

Almost surely, 2^640576416 is an apocalyptic number.

It is an amenable number.

640576416 is an abundant number, since it is smaller than the sum of its proper divisors (1040936928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640576416 is a wasteful number, since it uses less digits than its factorization.

640576416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672684 (or 6672676 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 640576416 is about 25309.6111388540. The cubic root of 640576416 is about 862.0325172604.

The spelling of 640576416 in words is "six hundred forty million, five hundred seventy-six thousand, four hundred sixteen".