640253005354 has 8 divisors (see below), whose sum is σ = 960859944000. Its totient is φ = 319966357356.

The previous prime is 640253005321. The next prime is 640253005387. The reversal of 640253005354 is 453500352046.

It is an interprime number because it is at equal distance from previous prime (640253005321) and next prime (640253005387).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80067664 + ... + 80075659.

It is an arithmetic number, because the mean of its divisors is an integer number (120107493000).

Almost surely, 2^640253005354 is an apocalyptic number.

640253005354 is a deficient number, since it is larger than the sum of its proper divisors (320606938646).

640253005354 is a wasteful number, since it uses less digits than its factorization.

640253005354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160145324.

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 640253005354 in words is "six hundred forty billion, two hundred fifty-three million, five thousand, three hundred fifty-four".