495081621 has 6 divisors (see below), whose sum is σ = 715117910. Its totient is φ = 330054408.

The previous prime is 495081611. The next prime is 495081623. The reversal of 495081621 is 126180594.

495081621 is a `hidden beast` number, since 495 + 0 + 8 + 162 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 355511025 + 139570596 = 18855^2 + 11814^2 .

It is not a de Polignac number, because 495081621 - 2⁶ = 495081557 is a prime.

It is a super-2 number, since 2×495081621² = 490211622903975282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495081623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27504526 + ... + 27504543.

Almost surely, 2^495081621 is an apocalyptic number.

It is an amenable number.

495081621 is a deficient number, since it is larger than the sum of its proper divisors (220036289).

495081621 is a wasteful number, since it uses less digits than its factorization.

495081621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55009075 (or 55009072 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 495081621 is about 22250.4296812444. The cubic root of 495081621 is about 791.0894657211.

The spelling of 495081621 in words is "four hundred ninety-five million, eighty-one thousand, six hundred twenty-one".