491514878292 has 12 divisors (see below), whose sum is σ = 1146868049376. Its totient is φ = 163838292760.

The previous prime is 491514878213. The next prime is 491514878293. The reversal of 491514878292 is 292878415194.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491514878293) 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, 20479786584 + ... + 20479786607.

It is an arithmetic number, because the mean of its divisors is an integer number (95572337448).

Almost surely, 2^491514878292 is an apocalyptic number.

It is an amenable number.

491514878292 is an abundant number, since it is smaller than the sum of its proper divisors (655353171084).

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

491514878292 is a wasteful number, since it uses less digits than its factorization.

491514878292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40959573198 (or 40959573196 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 60.

The spelling of 491514878292 in words is "four hundred ninety-one billion, five hundred fourteen million, eight hundred seventy-eight thousand, two hundred ninety-two".