640201352682 has 16 divisors (see below), whose sum is σ = 1281580641792. Its totient is φ = 213204128160.

The previous prime is 640201352669. The next prime is 640201352701. The reversal of 640201352682 is 286253102046.

It is a self number, because there is not a number n which added to its sum of digits gives 640201352682.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49073619 + ... + 49086662.

It is an arithmetic number, because the mean of its divisors is an integer number (80098790112).

Almost surely, 2^640201352682 is an apocalyptic number.

640201352682 is an abundant number, since it is smaller than the sum of its proper divisors (641379289110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640201352682 is a wasteful number, since it uses less digits than its factorization.

640201352682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98161373.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 640201352682 in words is "six hundred forty billion, two hundred one million, three hundred fifty-two thousand, six hundred eighty-two".