640116252654 has 16 divisors (see below), whose sum is σ = 1280613680640. Its totient is φ = 213308555000.

The previous prime is 640116252647. The next prime is 640116252667. The reversal of 640116252654 is 456252611046.

It is a congruent number.

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, 15860472 + ... + 15900779.

It is an arithmetic number, because the mean of its divisors is an integer number (80038355040).

Almost surely, 2^640116252654 is an apocalyptic number.

640116252654 is an abundant number, since it is smaller than the sum of its proper divisors (640497427986).

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

640116252654 is a wasteful number, since it uses less digits than its factorization.

640116252654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31764615.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 640116252654 in words is "six hundred forty billion, one hundred sixteen million, two hundred fifty-two thousand, six hundred fifty-four".