461563881 has 16 divisors (see below), whose sum is σ = 626537280. Its totient is φ = 302166720.

The previous prime is 461563877. The next prime is 461563891. The reversal of 461563881 is 188365164.

It is not a de Polignac number, because 461563881 - 2² = 461563877 is a prime.

It is a super-2 number, since 2×461563881² = 426082432487564322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (461563801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133531 + ... + 136943.

It is an arithmetic number, because the mean of its divisors is an integer number (39158580).

Almost surely, 2^461563881 is an apocalyptic number.

It is an amenable number.

461563881 is a deficient number, since it is larger than the sum of its proper divisors (164973399).

461563881 is a wasteful number, since it uses less digits than its factorization.

461563881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216.

The product of its digits is 138240, while the sum is 42.

The square root of 461563881 is about 21484.0378188086. The cubic root of 461563881 is about 772.8180770342.

The spelling of 461563881 in words is "four hundred sixty-one million, five hundred sixty-three thousand, eight hundred eighty-one".