27656776123 has 2 divisors, whose sum is σ = 27656776124. Its totient is φ = 27656776122.

The previous prime is 27656776097. The next prime is 27656776129. The reversal of 27656776123 is 32167765672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27656776123 - 2²¹ = 27654678971 is a prime.

It is a super-2 number, since 2×27656776123² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27656776129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13828388061 + 13828388062.

It is an arithmetic number, because the mean of its divisors is an integer number (13828388062).

Almost surely, 2^27656776123 is an apocalyptic number.

27656776123 is a deficient number, since it is larger than the sum of its proper divisors (1).

27656776123 is an equidigital number, since it uses as much as digits as its factorization.

27656776123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 52.

The spelling of 27656776123 in words is "twenty-seven billion, six hundred fifty-six million, seven hundred seventy-six thousand, one hundred twenty-three".