640174899332 has 12 divisors (see below), whose sum is σ = 1120326827676. Its totient is φ = 320081520000.

The previous prime is 640174899313. The next prime is 640174899349. The reversal of 640174899332 is 233998471046.

It can be written as a sum of positive squares in 2 ways, for example, as 38842891396 + 601332007936 = 197086^2 + 775456^2 .

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, 1234913 + ... + 1674920.

It is an arithmetic number, because the mean of its divisors is an integer number (93360568973).

Almost surely, 2^640174899332 is an apocalyptic number.

It is an amenable number.

640174899332 is a deficient number, since it is larger than the sum of its proper divisors (480151928344).

640174899332 is a wasteful number, since it uses less digits than its factorization.

640174899332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964838 (or 2964836 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 640174899332 in words is "six hundred forty billion, one hundred seventy-four million, eight hundred ninety-nine thousand, three hundred thirty-two".