4316391661 has 2 divisors, whose sum is σ = 4316391662. Its totient is φ = 4316391660.

The previous prime is 4316391649. The next prime is 4316391691. The reversal of 4316391661 is 1661936134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3222832900 + 1093558761 = 56770^2 + 33069^2 .

It is a cyclic number.

It is not a de Polignac number, because 4316391661 - 2²³ = 4308003053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4316391691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2158195830 + 2158195831.

It is an arithmetic number, because the mean of its divisors is an integer number (2158195831).

Almost surely, 2^4316391661 is an apocalyptic number.

It is an amenable number.

4316391661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4316391661 is an equidigital number, since it uses as much as digits as its factorization.

4316391661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 4316391661 is about 65699.2516015213. The cubic root of 4316391661 is about 1628.1969927707.

The spelling of 4316391661 in words is "four billion, three hundred sixteen million, three hundred ninety-one thousand, six hundred sixty-one".