640174774 has 8 divisors (see below), whose sum is σ = 960897240. Its totient is φ = 319875696.

The previous prime is 640174751. The next prime is 640174781. The reversal of 640174774 is 477471046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 102039 + ... + 108130.

It is an arithmetic number, because the mean of its divisors is an integer number (120112155).

Almost surely, 2^640174774 is an apocalyptic number.

640174774 is a deficient number, since it is larger than the sum of its proper divisors (320722466).

640174774 is a wasteful number, since it uses less digits than its factorization.

640174774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211694.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 640174774 is about 25301.6753200257. The cubic root of 640174774 is about 861.8523145332.

The spelling of 640174774 in words is "six hundred forty million, one hundred seventy-four thousand, seven hundred seventy-four".