1638097019227 has 2 divisors, whose sum is σ = 1638097019228. Its totient is φ = 1638097019226.

The previous prime is 1638097019203. The next prime is 1638097019233. The reversal of 1638097019227 is 7229107908361.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1638097019227 - 2³⁹ = 1088341205339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1638097019257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819048509613 + 819048509614.

It is an arithmetic number, because the mean of its divisors is an integer number (819048509614).

Almost surely, 2^{1638097019227} is an apocalyptic number.

1638097019227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1638097019227 is an equidigital number, since it uses as much as digits as its factorization.

1638097019227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 1638097019227 in words is "one trillion, six hundred thirty-eight billion, ninety-seven million, nineteen thousand, two hundred twenty-seven".