491580449380 has 12 divisors (see below), whose sum is σ = 1032318943740. Its totient is φ = 196632179744.

The previous prime is 491580449281. The next prime is 491580449413. The reversal of 491580449380 is 83944085194.

It can be written as a sum of positive squares in 2 ways, for example, as 247597798464 + 243982650916 = 497592^2 + 493946^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12289511215 + ... + 12289511254.

It is an arithmetic number, because the mean of its divisors is an integer number (86026578645).

Almost surely, 2^491580449380 is an apocalyptic number.

It is an amenable number.

491580449380 is an abundant number, since it is smaller than the sum of its proper divisors (540738494360).

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

491580449380 is a wasteful number, since it uses less digits than its factorization.

491580449380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24579022478 (or 24579022476 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 491580449380 in words is "four hundred ninety-one billion, five hundred eighty million, four hundred forty-nine thousand, three hundred eighty".