640254514 has 16 divisors (see below), whose sum is σ = 1021356000. Its totient is φ = 300150144.

The previous prime is 640254487. The next prime is 640254521. The reversal of 640254514 is 415452046.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83164 + ... + 90535.

It is an arithmetic number, because the mean of its divisors is an integer number (63834750).

Almost surely, 2^640254514 is an apocalyptic number.

640254514 is a deficient number, since it is larger than the sum of its proper divisors (381101486).

640254514 is a wasteful number, since it uses less digits than its factorization.

640254514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173817.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 640254514 is about 25303.2510559414. The cubic root of 640254514 is about 861.8880970794. Note that the first 3 decimals are identical.

The spelling of 640254514 in words is "six hundred forty million, two hundred fifty-four thousand, five hundred fourteen".