461439682661 has 4 divisors (see below), whose sum is σ = 461480576352. Its totient is φ = 461398788972.

The previous prime is 461439682651. The next prime is 461439682709. The reversal of 461439682661 is 166286934164.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-461439682661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 461439682597 and 461439682606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461439682651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20429915 + ... + 20452488.

It is an arithmetic number, because the mean of its divisors is an integer number (115370144088).

Almost surely, 2^461439682661 is an apocalyptic number.

It is an amenable number.

461439682661 is a deficient number, since it is larger than the sum of its proper divisors (40893691).

461439682661 is a wasteful number, since it uses less digits than its factorization.

461439682661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40893690.

The product of its digits is 8957952, while the sum is 56.

The spelling of 461439682661 in words is "four hundred sixty-one billion, four hundred thirty-nine million, six hundred eighty-two thousand, six hundred sixty-one".