491002540125 has 32 divisors (see below), whose sum is σ = 822906215040. Its totient is φ = 259984051200.

The previous prime is 491002540111. The next prime is 491002540141. The reversal of 491002540125 is 521045200194.

It is not a de Polignac number, because 491002540125 - 2⁷ = 491002539997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4657732 + ... + 4761981.

It is an arithmetic number, because the mean of its divisors is an integer number (25715819220).

Almost surely, 2^491002540125 is an apocalyptic number.

It is an amenable number.

491002540125 is a deficient number, since it is larger than the sum of its proper divisors (331903674915).

491002540125 is a wasteful number, since it uses less digits than its factorization.

491002540125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419870 (or 9419860 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 491002540125 in words is "four hundred ninety-one billion, two million, five hundred forty thousand, one hundred twenty-five".