55765669013 has 2 divisors, whose sum is σ = 55765669014. Its totient is φ = 55765669012.

The previous prime is 55765668977. The next prime is 55765669031. The reversal of 55765669013 is 31096656755.

Together with next prime (55765669031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48831276484 + 6934392529 = 220978^2 + 83273^2 .

It is a cyclic number.

It is not a de Polignac number, because 55765669013 - 2³⁰ = 54691927189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55785669013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27882834506 + 27882834507.

It is an arithmetic number, because the mean of its divisors is an integer number (27882834507).

Almost surely, 2^55765669013 is an apocalyptic number.

It is an amenable number.

55765669013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55765669013 is an equidigital number, since it uses as much as digits as its factorization.

55765669013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103000, while the sum is 53.

The spelling of 55765669013 in words is "fifty-five billion, seven hundred sixty-five million, six hundred sixty-nine thousand, thirteen".