27777675361 has 2 divisors, whose sum is σ = 27777675362. Its totient is φ = 27777675360.

The previous prime is 27777675353. The next prime is 27777675383. The reversal of 27777675361 is 16357677772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23637525025 + 4140150336 = 153745^2 + 64344^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777675361 - 2³ = 27777675353 is a prime.

It is a super-2 number, since 2×27777675361² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27777675296 and 27777675305.

It is not a weakly prime, because it can be changed into another prime (27777675661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888837680 + 13888837681.

It is an arithmetic number, because the mean of its divisors is an integer number (13888837681).

Almost surely, 2^27777675361 is an apocalyptic number.

It is an amenable number.

27777675361 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777675361 is an equidigital number, since it uses as much as digits as its factorization.

27777675361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18151560, while the sum is 58.

The spelling of 27777675361 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-five thousand, three hundred sixty-one".