640442260002 has 16 divisors (see below), whose sum is σ = 1322203375872. Its totient is φ = 206594277360.

The previous prime is 640442260001. The next prime is 640442260009. The reversal of 640442260002 is 200062244046.

It is not an unprimeable number, because it can be changed into a prime (640442260001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1721618793 + ... + 1721619164.

It is an arithmetic number, because the mean of its divisors is an integer number (82637710992).

Almost surely, 2^640442260002 is an apocalyptic number.

640442260002 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

640442260002 is an abundant number, since it is smaller than the sum of its proper divisors (681761115870).

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

640442260002 is a wasteful number, since it uses less digits than its factorization.

640442260002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443237993.

The product of its (nonzero) digits is 18432, while the sum is 30.

The spelling of 640442260002 in words is "six hundred forty billion, four hundred forty-two million, two hundred sixty thousand, two".