640174502 has 16 divisors (see below), whose sum is σ = 1093105152. Its totient is φ = 278336520.

The previous prime is 640174501. The next prime is 640174517. The reversal of 640174502 is 205471046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640174501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632078 + ... + 633089.

It is an arithmetic number, because the mean of its divisors is an integer number (68319072).

Almost surely, 2^640174502 is an apocalyptic number.

640174502 is a deficient number, since it is larger than the sum of its proper divisors (452930650).

640174502 is a wasteful number, since it uses less digits than its factorization.

640174502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265203.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 640174502 is about 25301.6699448870. The cubic root of 640174502 is about 861.8521924708.

The spelling of 640174502 in words is "six hundred forty million, one hundred seventy-four thousand, five hundred two".