55355778833 has 2 divisors, whose sum is σ = 55355778834. Its totient is φ = 55355778832.

The previous prime is 55355778809. The next prime is 55355778871. The reversal of 55355778833 is 33887755355.

55355778833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36872832529 + 18482946304 = 192023^2 + 135952^2 .

It is a cyclic number.

It is not a de Polignac number, because 55355778833 - 2³⁰ = 54282037009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55355775833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27677889416 + 27677889417.

It is an arithmetic number, because the mean of its divisors is an integer number (27677889417).

Almost surely, 2^55355778833 is an apocalyptic number.

It is an amenable number.

55355778833 is a deficient number, since it is larger than the sum of its proper divisors (1).

55355778833 is an equidigital number, since it uses as much as digits as its factorization.

55355778833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920000, while the sum is 59.

The spelling of 55355778833 in words is "fifty-five billion, three hundred fifty-five million, seven hundred seventy-eight thousand, eight hundred thirty-three".