491910291822776 has 32 divisors (see below), whose sum is σ = 923090583602880. Its totient is φ = 245752806998400.

The previous prime is 491910291822749. The next prime is 491910291822793. The reversal of 491910291822776 is 677228192019194.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272138746 + ... + 1272525366.

It is an arithmetic number, because the mean of its divisors is an integer number (28846580737590).

Almost surely, 2^{491910291822776} is an apocalyptic number.

It is an amenable number.

491910291822776 is a deficient number, since it is larger than the sum of its proper divisors (431180291780104).

491910291822776 is a wasteful number, since it uses less digits than its factorization.

491910291822776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517055 (or 517051 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 491910291822776 in words is "four hundred ninety-one trillion, nine hundred ten billion, two hundred ninety-one million, eight hundred twenty-two thousand, seven hundred seventy-six".