640135364 has 12 divisors (see below), whose sum is σ = 1222076688. Its totient is φ = 290970600.

The previous prime is 640135351. The next prime is 640135369. The reversal of 640135364 is 463531046.

It is a self number, because there is not a number n which added to its sum of digits gives 640135364.

It is not an unprimeable number, because it can be changed into a prime (640135369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7274222 + ... + 7274309.

It is an arithmetic number, because the mean of its divisors is an integer number (101839724).

Almost surely, 2^640135364 is an apocalyptic number.

It is an amenable number.

640135364 is a deficient number, since it is larger than the sum of its proper divisors (581941324).

640135364 is a wasteful number, since it uses less digits than its factorization.

640135364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14548546 (or 14548544 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 640135364 is about 25300.8965058553. The cubic root of 640135364 is about 861.8346285834.

The spelling of 640135364 in words is "six hundred forty million, one hundred thirty-five thousand, three hundred sixty-four".