491553441 has 10 divisors (see below), whose sum is σ = 734296002. Its totient is φ = 327702240.

The previous prime is 491553431. The next prime is 491553443. The reversal of 491553441 is 144355194.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 338412816 + 153140625 = 18396^2 + 12375^2 .

It is not a de Polignac number, because 491553441 - 2¹⁷ = 491422369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491553396 and 491553405.

It is not an unprimeable number, because it can be changed into a prime (491553443) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3034200 + ... + 3034361.

Almost surely, 2^491553441 is an apocalyptic number.

It is an amenable number.

491553441 is a deficient number, since it is larger than the sum of its proper divisors (242742561).

491553441 is an equidigital number, since it uses as much as digits as its factorization.

491553441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6068573 (or 6068564 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 491553441 is about 22171.0045103960. The cubic root of 491553441 is about 789.2057610791.

The spelling of 491553441 in words is "four hundred ninety-one million, five hundred fifty-three thousand, four hundred forty-one".