55505201819 has 2 divisors, whose sum is σ = 55505201820. Its totient is φ = 55505201818.

The previous prime is 55505201803. The next prime is 55505201849. The reversal of 55505201819 is 91810250555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55505201819 - 2⁴ = 55505201803 is a prime.

It is a super-2 number, since 2×55505201819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55505201849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752600909 + 27752600910.

It is an arithmetic number, because the mean of its divisors is an integer number (27752600910).

Almost surely, 2^55505201819 is an apocalyptic number.

55505201819 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505201819 is an equidigital number, since it uses as much as digits as its factorization.

55505201819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 41.

The spelling of 55505201819 in words is "fifty-five billion, five hundred five million, two hundred one thousand, eight hundred nineteen".