491777234568192 has 88 divisors (see below), whose sum is σ = 1310772258979776. Its totient is φ = 163924915068928.

The previous prime is 491777234568181. The next prime is 491777234568209. The reversal of 491777234568192 is 291865432777194.

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 7 ways as a sum of consecutive naturals, for example, 1048248298 + ... + 1048717334.

Almost surely, 2^{491777234568192} is an apocalyptic number.

It is an amenable number.

491777234568192 is an abundant number, since it is smaller than the sum of its proper divisors (818995024411584).

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

491777234568192 is a wasteful number, since it uses less digits than its factorization.

491777234568192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810363 (or 810345 counting only the distinct ones).

The product of its digits is 1280240640, while the sum is 75.

The spelling of 491777234568192 in words is "four hundred ninety-one trillion, seven hundred seventy-seven billion, two hundred thirty-four million, five hundred sixty-eight thousand, one hundred ninety-two".