491544448972 has 12 divisors (see below), whose sum is σ = 860236306216. Its totient is φ = 245762647200.

The previous prime is 491544448951. The next prime is 491544448999. The reversal of 491544448972 is 279844445194.

It is a super-2 number, since 2×491544448972² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491544448972.

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, 2278218 + ... + 2484625.

Almost surely, 2^491544448972 is an apocalyptic number.

It is an amenable number.

491544448972 is a deficient number, since it is larger than the sum of its proper divisors (368691857244).

491544448972 is a wasteful number, since it uses less digits than its factorization.

491544448972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788648 (or 4788646 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 61.

The spelling of 491544448972 in words is "four hundred ninety-one billion, five hundred forty-four million, four hundred forty-eight thousand, nine hundred seventy-two".