27788016511391 has 2 divisors, whose sum is σ = 27788016511392. Its totient is φ = 27788016511390.

The previous prime is 27788016511327. The next prime is 27788016511441. The reversal of 27788016511391 is 19311561088772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27788016511391 - 2⁶ = 27788016511327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27788016511391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27788016511691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13894008255695 + 13894008255696.

It is an arithmetic number, because the mean of its divisors is an integer number (13894008255696).

Almost surely, 2^{27788016511391} is an apocalyptic number.

27788016511391 is a deficient number, since it is larger than the sum of its proper divisors (1).

27788016511391 is an equidigital number, since it uses as much as digits as its factorization.

27788016511391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 59.

The spelling of 27788016511391 in words is "twenty-seven trillion, seven hundred eighty-eight billion, sixteen million, five hundred eleven thousand, three hundred ninety-one".