461978811 has 30 divisors (see below), whose sum is σ = 778509940. Its totient is φ = 263975544.

The previous prime is 461978801. The next prime is 461978827. The reversal of 461978811 is 118879164.

It is a happy number.

It is not a de Polignac number, because 461978811 - 2⁵ = 461978779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461978801) 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 29 ways as a sum of consecutive naturals, for example, 10920 + ... + 32298.

Almost surely, 2^461978811 is an apocalyptic number.

461978811 is a deficient number, since it is larger than the sum of its proper divisors (316531129).

461978811 is an equidigital number, since it uses as much as digits as its factorization.

461978811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21413 (or 21389 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 461978811 is about 21493.6923538046. The cubic root of 461978811 is about 773.0495866018.

The spelling of 461978811 in words is "four hundred sixty-one million, nine hundred seventy-eight thousand, eight hundred eleven".