491768258355 has 72 divisors (see below), whose sum is σ = 960854047920. Its totient is φ = 230741481600.

The previous prime is 491768258279. The next prime is 491768258419. The reversal of 491768258355 is 553852867194.

491768258355 is a `hidden beast` number, since 4 + 91 + 76 + 82 + 58 + 355 = 666.

It is not a de Polignac number, because 491768258355 - 2¹² = 491768254259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491768258292 and 491768258301.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41200 + ... + 992589.

It is an arithmetic number, because the mean of its divisors is an integer number (13345195110).

Almost surely, 2^491768258355 is an apocalyptic number.

491768258355 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

491768258355 is a deficient number, since it is larger than the sum of its proper divisors (469085789565).

491768258355 is a wasteful number, since it uses less digits than its factorization.

491768258355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033873 (or 1033839 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 491768258355 in words is "four hundred ninety-one billion, seven hundred sixty-eight million, two hundred fifty-eight thousand, three hundred fifty-five".