640265602502 has 8 divisors (see below), whose sum is σ = 960522718176. Its totient is φ = 320091363112.

The previous prime is 640265602489. The next prime is 640265602511. The reversal of 640265602502 is 205206562046.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20699753 + ... + 20730660.

It is an arithmetic number, because the mean of its divisors is an integer number (120065339772).

Almost surely, 2^640265602502 is an apocalyptic number.

640265602502 is a deficient number, since it is larger than the sum of its proper divisors (320257115674).

640265602502 is a wasteful number, since it uses less digits than its factorization.

640265602502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41438142.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 640265602502 in words is "six hundred forty billion, two hundred sixty-five million, six hundred two thousand, five hundred two".