27189894899 has 2 divisors, whose sum is σ = 27189894900. Its totient is φ = 27189894898.

The previous prime is 27189894833. The next prime is 27189894967. The reversal of 27189894899 is 99849898172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27189894899 - 2¹⁶ = 27189829363 is a prime.

It is not a weakly prime, because it can be changed into another prime (27189894829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13594947449 + 13594947450.

It is an arithmetic number, because the mean of its divisors is an integer number (13594947450).

Almost surely, 2^27189894899 is an apocalyptic number.

27189894899 is a deficient number, since it is larger than the sum of its proper divisors (1).

27189894899 is an equidigital number, since it uses as much as digits as its factorization.

27189894899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188116992, while the sum is 74.

The spelling of 27189894899 in words is "twenty-seven billion, one hundred eighty-nine million, eight hundred ninety-four thousand, eight hundred ninety-nine".