27456794861 has 2 divisors, whose sum is σ = 27456794862. Its totient is φ = 27456794860.

The previous prime is 27456794789. The next prime is 27456794867. The reversal of 27456794861 is 16849765472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26497653961 + 959140900 = 162781^2 + 30970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27456794861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27456794861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27456794867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13728397430 + 13728397431.

It is an arithmetic number, because the mean of its divisors is an integer number (13728397431).

Almost surely, 2^27456794861 is an apocalyptic number.

It is an amenable number.

27456794861 is a deficient number, since it is larger than the sum of its proper divisors (1).

27456794861 is an equidigital number, since it uses as much as digits as its factorization.

27456794861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 59.

The spelling of 27456794861 in words is "twenty-seven billion, four hundred fifty-six million, seven hundred ninety-four thousand, eight hundred sixty-one".