27800213719 has 2 divisors, whose sum is σ = 27800213720. Its totient is φ = 27800213718.

The previous prime is 27800213663. The next prime is 27800213729. The reversal of 27800213719 is 91731200872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27800213719 - 2⁷ = 27800213591 is a prime.

It is a super-2 number, since 2×27800213719² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27800213729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900106859 + 13900106860.

It is an arithmetic number, because the mean of its divisors is an integer number (13900106860).

Almost surely, 2^27800213719 is an apocalyptic number.

27800213719 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800213719 is an equidigital number, since it uses as much as digits as its factorization.

27800213719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 27800213719 in words is "twenty-seven billion, eight hundred million, two hundred thirteen thousand, seven hundred nineteen".