5436661361 has 2 divisors, whose sum is σ = 5436661362. Its totient is φ = 5436661360.

The previous prime is 5436661357. The next prime is 5436661367. The reversal of 5436661361 is 1631666345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4258867600 + 1177793761 = 65260^2 + 34319^2 .

It is a cyclic number.

It is not a de Polignac number, because 5436661361 - 2² = 5436661357 is a prime.

It is not a weakly prime, because it can be changed into another prime (5436661367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2718330680 + 2718330681.

It is an arithmetic number, because the mean of its divisors is an integer number (2718330681).

Almost surely, 2^5436661361 is an apocalyptic number.

It is an amenable number.

5436661361 is a deficient number, since it is larger than the sum of its proper divisors (1).

5436661361 is an equidigital number, since it uses as much as digits as its factorization.

5436661361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 41.

The square root of 5436661361 is about 73733.7192944992. The cubic root of 5436661361 is about 1758.3720053568.

The spelling of 5436661361 in words is "five billion, four hundred thirty-six million, six hundred sixty-one thousand, three hundred sixty-one".