461897618 has 54 divisors (see below), whose sum is σ = 877987701. Its totient is φ = 181634544.

The previous prime is 461897563. The next prime is 461897621. The reversal of 461897618 is 816798164.

It can be written as a sum of positive squares in 2 ways, for example, as 394936129 + 66961489 = 19873^2 + 8183^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=15197.

It is a Duffinian number.

Its product of digits (580608) is a multiple of the sum of its prime divisors (189).

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 2765771 + ... + 2765937.

Almost surely, 2^461897618 is an apocalyptic number.

461897618 is a deficient number, since it is larger than the sum of its proper divisors (416090083).

461897618 is a wasteful number, since it uses less digits than its factorization.

461897618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 189 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 461897618 is about 21491.8035073839. The cubic root of 461897618 is about 773.0042960019.

Multiplying 461897618 by its sum of digits (50), we get a square (23094880900 = 151970²).

The spelling of 461897618 in words is "four hundred sixty-one million, eight hundred ninety-seven thousand, six hundred eighteen".