27777655523 has 2 divisors, whose sum is σ = 27777655524. Its totient is φ = 27777655522.

The previous prime is 27777655469. The next prime is 27777655531. The reversal of 27777655523 is 32555677772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27777655523 - 2⁶ = 27777655459 is a prime.

It is not a weakly prime, because it can be changed into another prime (27777655123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888827761 + 13888827762.

It is an arithmetic number, because the mean of its divisors is an integer number (13888827762).

Almost surely, 2^27777655523 is an apocalyptic number.

27777655523 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777655523 is an equidigital number, since it uses as much as digits as its factorization.

27777655523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21609000, while the sum is 56.

The spelling of 27777655523 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred fifty-five thousand, five hundred twenty-three".