640027516 has 12 divisors (see below), whose sum is σ = 1139032440. Its totient is φ = 314589680.

The previous prime is 640027489. The next prime is 640027537. The reversal of 640027516 is 615720046.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1355755 + ... + 1356226.

It is an arithmetic number, because the mean of its divisors is an integer number (94919370).

Almost surely, 2^640027516 is an apocalyptic number.

It is an amenable number.

640027516 is a deficient number, since it is larger than the sum of its proper divisors (499004924).

640027516 is a wasteful number, since it uses less digits than its factorization.

640027516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712044 (or 2712042 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 640027516 is about 25298.7651082024. The cubic root of 640027516 is about 861.7862261326.

The spelling of 640027516 in words is "six hundred forty million, twenty-seven thousand, five hundred sixteen".