491115456 has 84 divisors (see below), whose sum is σ = 1516001032. Its totient is φ = 151110144.

The previous prime is 491115451. The next prime is 491115479. The reversal of 491115456 is 654511194.

491115456 is a `hidden beast` number, since 4 + 91 + 115 + 456 = 666.

It is a super-2 number, since 2×491115456² = 482388782244175872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 491115456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491115451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25306 + ... + 40281.

Almost surely, 2^491115456 is an apocalyptic number.

It is an amenable number.

491115456 is an abundant number, since it is smaller than the sum of its proper divisors (1024885576).

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

491115456 is a wasteful number, since it uses less digits than its factorization.

491115456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65618 (or 65605 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 491115456 is about 22161.1248811968. The cubic root of 491115456 is about 788.9712914901.

The spelling of 491115456 in words is "four hundred ninety-one million, one hundred fifteen thousand, four hundred fifty-six".