27747856373 has 2 divisors, whose sum is σ = 27747856374. Its totient is φ = 27747856372.

The previous prime is 27747856369. The next prime is 27747856387. The reversal of 27747856373 is 37365874772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26744677444 + 1003178929 = 163538^2 + 31673^2 .

It is a cyclic number.

It is not a de Polignac number, because 27747856373 - 2² = 27747856369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27747856343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13873928186 + 13873928187.

It is an arithmetic number, because the mean of its divisors is an integer number (13873928187).

Almost surely, 2^27747856373 is an apocalyptic number.

It is an amenable number.

27747856373 is a deficient number, since it is larger than the sum of its proper divisors (1).

27747856373 is an equidigital number, since it uses as much as digits as its factorization.

27747856373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41489280, while the sum is 59.

The spelling of 27747856373 in words is "twenty-seven billion, seven hundred forty-seven million, eight hundred fifty-six thousand, three hundred seventy-three".