4612644661 has 2 divisors, whose sum is σ = 4612644662. Its totient is φ = 4612644660.

The previous prime is 4612644623. The next prime is 4612644671. The reversal of 4612644661 is 1664462164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3469799025 + 1142845636 = 58905^2 + 33806^2 .

It is a cyclic number.

It is not a de Polignac number, because 4612644661 - 2²³ = 4604256053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4612644671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2306322330 + 2306322331.

It is an arithmetic number, because the mean of its divisors is an integer number (2306322331).

Almost surely, 2^4612644661 is an apocalyptic number.

It is an amenable number.

4612644661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4612644661 is an equidigital number, since it uses as much as digits as its factorization.

4612644661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 40.

The square root of 4612644661 is about 67916.4535366799. The cubic root of 4612644661 is about 1664.6259727920.

The spelling of 4612644661 in words is "four billion, six hundred twelve million, six hundred forty-four thousand, six hundred sixty-one".