461945691 has 12 divisors (see below), whose sum is σ = 667455360. Its totient is φ = 307871280.

The previous prime is 461945621. The next prime is 461945717. The reversal of 461945691 is 196549164.

It is a happy number.

It is not a de Polignac number, because 461945691 - 2¹³ = 461937499 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (461945621) 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 11 ways as a sum of consecutive naturals, for example, 38470 + ... + 49028.

It is an arithmetic number, because the mean of its divisors is an integer number (55621280).

Almost surely, 2^461945691 is an apocalyptic number.

461945691 is a deficient number, since it is larger than the sum of its proper divisors (205509669).

461945691 is a wasteful number, since it uses less digits than its factorization.

461945691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15426 (or 15423 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 461945691 is about 21492.9218814009. The cubic root of 461945691 is about 773.0311124399.

The spelling of 461945691 in words is "four hundred sixty-one million, nine hundred forty-five thousand, six hundred ninety-one".