640613116 has 48 divisors (see below), whose sum is σ = 1352705760. Its totient is φ = 261515520.

The previous prime is 640613111. The next prime is 640613117. The reversal of 640613116 is 611316046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640613111) 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, 6030 + ... + 36298.

It is an arithmetic number, because the mean of its divisors is an integer number (28181370).

Almost surely, 2^640613116 is an apocalyptic number.

It is an amenable number.

640613116 is an abundant number, since it is smaller than the sum of its proper divisors (712092644).

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

640613116 is a wasteful number, since it uses less digits than its factorization.

640613116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30334 (or 30332 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 640613116 is about 25310.3361494864. The cubic root of 640613116 is about 862.0489795113.

The spelling of 640613116 in words is "six hundred forty million, six hundred thirteen thousand, one hundred sixteen".