461812666625 has 8 divisors (see below), whose sum is σ = 576342208104. Its totient is φ = 369450133200.

The previous prime is 461812666613. The next prime is 461812666631. The reversal of 461812666625 is 526666218164.

It is a Cunningham number, because it is equal to 679568²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 461812666624 = 1^2 + 679568^2 .

It is a de Polignac number, because none of the positive numbers 2^k-461812666625 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847250542 + ... + 1847250791.

It is an arithmetic number, because the mean of its divisors is an integer number (72042776013).

Almost surely, 2^461812666625 is an apocalyptic number.

It is an amenable number.

461812666625 is a deficient number, since it is larger than the sum of its proper divisors (114529541479).

461812666625 is an equidigital number, since it uses as much as digits as its factorization.

461812666625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694501348 (or 3694501338 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The spelling of 461812666625 in words is "four hundred sixty-one billion, eight hundred twelve million, six hundred sixty-six thousand, six hundred twenty-five".