640172242414444 has 12 divisors (see below), whose sum is σ = 1120618520605584. Its totient is φ = 319995522241424.

The previous prime is 640172242414421. The next prime is 640172242414457. The reversal of 640172242414444 is 444414242271046.

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, 22649725552 + ... + 22649753815.

It is an arithmetic number, because the mean of its divisors is an integer number (93384876717132).

Almost surely, 2^{640172242414444} is an apocalyptic number.

It is an amenable number.

640172242414444 is a deficient number, since it is larger than the sum of its proper divisors (480446278191140).

640172242414444 is a wasteful number, since it uses less digits than its factorization.

640172242414444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45299482904 (or 45299482902 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 49.

The spelling of 640172242414444 in words is "six hundred forty trillion, one hundred seventy-two billion, two hundred forty-two million, four hundred fourteen thousand, four hundred forty-four".