644088240462 has 16 divisors (see below), whose sum is σ = 1300215514752. Its totient is φ = 212689574520.

The previous prime is 644088240431. The next prime is 644088240473. The reversal of 644088240462 is 264042880446.

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, 501625714 + ... + 501626997.

It is an arithmetic number, because the mean of its divisors is an integer number (81263469672).

Almost surely, 2^644088240462 is an apocalyptic number.

644088240462 is an abundant number, since it is smaller than the sum of its proper divisors (656127274290).

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

644088240462 is a wasteful number, since it uses less digits than its factorization.

644088240462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003252823.

The product of its (nonzero) digits is 2359296, while the sum is 48.

The spelling of 644088240462 in words is "six hundred forty-four billion, eighty-eight million, two hundred forty thousand, four hundred sixty-two".