481945581 has 18 divisors (see below), whose sum is σ = 753814698. Its totient is φ = 296580960.

The previous prime is 481945553. The next prime is 481945613. The reversal of 481945581 is 185549184.

It is a happy number.

481945581 is a `hidden beast` number, since 4 + 8 + 1 + 94 + 558 + 1 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 24413481 + 457532100 = 4941^2 + 21390^2 .

It is not a de Polignac number, because 481945581 - 2⁶ = 481945517 is a prime.

It is a super-2 number, since 2×481945581² = 464543086090855122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481945531) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 156910 + ... + 159951.

Almost surely, 2^481945581 is an apocalyptic number.

It is an amenable number.

481945581 is a deficient number, since it is larger than the sum of its proper divisors (271869117).

481945581 is a wasteful number, since it uses less digits than its factorization.

481945581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316893 (or 316877 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 481945581 is about 21953.2590063526. The cubic root of 481945581 is about 784.0299760552.

The spelling of 481945581 in words is "four hundred eighty-one million, nine hundred forty-five thousand, five hundred eighty-one".