454991581 has 6 divisors (see below), whose sum is σ = 500114846. Its totient is φ = 413628600.

The previous prime is 454991561. The next prime is 454991599. The reversal of 454991581 is 185199454.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 335439225 + 119552356 = 18315^2 + 10934^2 .

It is not a de Polignac number, because 454991581 - 2²⁷ = 320773853 is a prime.

It is a super-2 number, since 2×454991581² = 414034677561759122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (454991531) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1880010 + ... + 1880251.

Almost surely, 2^454991581 is an apocalyptic number.

It is an amenable number.

454991581 is a deficient number, since it is larger than the sum of its proper divisors (45123265).

454991581 is a wasteful number, since it uses less digits than its factorization.

454991581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760283 (or 3760272 counting only the distinct ones).

The product of its digits is 259200, while the sum is 46.

The square root of 454991581 is about 21330.5316623848. The cubic root of 454991581 is about 769.1324242111.

The spelling of 454991581 in words is "four hundred fifty-four million, nine hundred ninety-one thousand, five hundred eighty-one".