5551364561 has 2 divisors, whose sum is σ = 5551364562. Its totient is φ = 5551364560.

The previous prime is 5551364537. The next prime is 5551364563. The reversal of 5551364561 is 1654631555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4727387536 + 823977025 = 68756^2 + 28705^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551364561 - 2¹⁰ = 5551363537 is a prime.

It is a Sophie Germain prime.

Together with 5551364563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5551364563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775682280 + 2775682281.

It is an arithmetic number, because the mean of its divisors is an integer number (2775682281).

Almost surely, 2^5551364561 is an apocalyptic number.

It is an amenable number.

5551364561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551364561 is an equidigital number, since it uses as much as digits as its factorization.

5551364561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 41.

The square root of 5551364561 is about 74507.4798996718. The cubic root of 5551364561 is about 1770.6521436396.

The spelling of 5551364561 in words is "five billion, five hundred fifty-one million, three hundred sixty-four thousand, five hundred sixty-one".