491371845542444 has 12 divisors (see below), whose sum is σ = 861428084462904. Its totient is φ = 245249535695904.

The previous prime is 491371845542441. The next prime is 491371845542471. The reversal of 491371845542444 is 444245548173194.

It is not an unprimeable number, because it can be changed into a prime (491371845542441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109096766297 + ... + 109096770800.

It is an arithmetic number, because the mean of its divisors is an integer number (71785673705242).

Almost surely, 2^{491371845542444} is an apocalyptic number.

It is an amenable number.

491371845542444 is a deficient number, since it is larger than the sum of its proper divisors (370056238920460).

491371845542444 is a wasteful number, since it uses less digits than its factorization.

491371845542444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218193537664 (or 218193537662 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 65.

The spelling of 491371845542444 in words is "four hundred ninety-one trillion, three hundred seventy-one billion, eight hundred forty-five million, five hundred forty-two thousand, four hundred forty-four".