27726703861 has 2 divisors, whose sum is σ = 27726703862. Its totient is φ = 27726703860.

The previous prime is 27726703841. The next prime is 27726703891. The reversal of 27726703861 is 16830762772.

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., 15023159761 + 12703544100 = 122569^2 + 112710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27726703861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27726703841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863351930 + 13863351931.

It is an arithmetic number, because the mean of its divisors is an integer number (13863351931).

Almost surely, 2^27726703861 is an apocalyptic number.

It is an amenable number.

27726703861 is a deficient number, since it is larger than the sum of its proper divisors (1).

27726703861 is an equidigital number, since it uses as much as digits as its factorization.

27726703861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 27726703861 in words is "twenty-seven billion, seven hundred twenty-six million, seven hundred three thousand, eight hundred sixty-one".