27787793251 has 2 divisors, whose sum is σ = 27787793252. Its totient is φ = 27787793250.

The previous prime is 27787793219. The next prime is 27787793263. The reversal of 27787793251 is 15239778772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27787793251 - 2⁵ = 27787793219 is a prime.

It is a super-2 number, since 2×27787793251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27787793651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13893896625 + 13893896626.

It is an arithmetic number, because the mean of its divisors is an integer number (13893896626).

Almost surely, 2^27787793251 is an apocalyptic number.

27787793251 is a deficient number, since it is larger than the sum of its proper divisors (1).

27787793251 is an equidigital number, since it uses as much as digits as its factorization.

27787793251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10372320, while the sum is 58.

The spelling of 27787793251 in words is "twenty-seven billion, seven hundred eighty-seven million, seven hundred ninety-three thousand, two hundred fifty-one".