27775525291 has 2 divisors, whose sum is σ = 27775525292. Its totient is φ = 27775525290.

The previous prime is 27775525277. The next prime is 27775525331. The reversal of 27775525291 is 19252557772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27775525291 - 2⁹ = 27775524779 is a prime.

It is not a weakly prime, because it can be changed into another prime (27715525291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13887762645 + 13887762646.

It is an arithmetic number, because the mean of its divisors is an integer number (13887762646).

Almost surely, 2^27775525291 is an apocalyptic number.

27775525291 is a deficient number, since it is larger than the sum of its proper divisors (1).

27775525291 is an equidigital number, since it uses as much as digits as its factorization.

27775525291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3087000, while the sum is 52.

The spelling of 27775525291 in words is "twenty-seven billion, seven hundred seventy-five million, five hundred twenty-five thousand, two hundred ninety-one".