4536409861 has 2 divisors, whose sum is σ = 4536409862. Its totient is φ = 4536409860.

The previous prime is 4536409837. The next prime is 4536409879. The reversal of 4536409861 is 1689046354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4520007361 + 16402500 = 67231^2 + 4050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4536409861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4536409061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2268204930 + 2268204931.

It is an arithmetic number, because the mean of its divisors is an integer number (2268204931).

Almost surely, 2^4536409861 is an apocalyptic number.

It is an amenable number.

4536409861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4536409861 is an equidigital number, since it uses as much as digits as its factorization.

4536409861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 4536409861 is about 67352.8756698628. The cubic root of 4536409861 is about 1655.4043621499.

The spelling of 4536409861 in words is "four billion, five hundred thirty-six million, four hundred nine thousand, eight hundred sixty-one".