5391450661 has 2 divisors, whose sum is σ = 5391450662. Its totient is φ = 5391450660.

The previous prime is 5391450637. The next prime is 5391450667. The reversal of 5391450661 is 1660541935.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3548465761 + 1842984900 = 59569^2 + 42930^2 .

It is a cyclic number.

It is not a de Polignac number, because 5391450661 - 2⁵ = 5391450629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5391450667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2695725330 + 2695725331.

It is an arithmetic number, because the mean of its divisors is an integer number (2695725331).

Almost surely, 2^5391450661 is an apocalyptic number.

It is an amenable number.

5391450661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5391450661 is an equidigital number, since it uses as much as digits as its factorization.

5391450661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 5391450661 is about 73426.4983572007. The cubic root of 5391450661 is about 1753.4842865169.

The spelling of 5391450661 in words is "five billion, three hundred ninety-one million, four hundred fifty thousand, six hundred sixty-one".