461634881 has 4 divisors (see below), whose sum is σ = 488789892. Its totient is φ = 434479872.

The previous prime is 461634787. The next prime is 461634923. The reversal of 461634881 is 188436164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 307651600 + 153983281 = 17540^2 + 12409^2 .

It is a cyclic number.

It is not a de Polignac number, because 461634881 - 2¹⁴ = 461618497 is a prime.

It is a super-2 number, since 2×461634881² = 426213526711768322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461634181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13577480 + ... + 13577513.

It is an arithmetic number, because the mean of its divisors is an integer number (122197473).

Almost surely, 2^461634881 is an apocalyptic number.

It is an amenable number.

461634881 is a deficient number, since it is larger than the sum of its proper divisors (27155011).

461634881 is a wasteful number, since it uses less digits than its factorization.

461634881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27155010.

The product of its digits is 110592, while the sum is 41.

The square root of 461634881 is about 21485.6901448383. The cubic root of 461634881 is about 772.8577012137.

The spelling of 461634881 in words is "four hundred sixty-one million, six hundred thirty-four thousand, eight hundred eighty-one".