640676014 has 16 divisors (see below), whose sum is σ = 1050168240. Its totient is φ = 290719360.

The previous prime is 640675993. The next prime is 640676021. The reversal of 640676014 is 410676046.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11509 + ... + 37600.

It is an arithmetic number, because the mean of its divisors is an integer number (65635515).

Almost surely, 2^640676014 is an apocalyptic number.

640676014 is a deficient number, since it is larger than the sum of its proper divisors (409492226).

640676014 is a wasteful number, since it uses less digits than its factorization.

640676014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49715.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 640676014 is about 25311.5786548370. The cubic root of 640676014 is about 862.0771917458.

The spelling of 640676014 in words is "six hundred forty million, six hundred seventy-six thousand, fourteen".