27753763861 has 2 divisors, whose sum is σ = 27753763862. Its totient is φ = 27753763860.

The previous prime is 27753763853. The next prime is 27753763903. The reversal of 27753763861 is 16836735772.

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., 19975582225 + 7778181636 = 141335^2 + 88194^2 .

It is a cyclic number.

It is not a de Polignac number, because 27753763861 - 2³ = 27753763853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27753763061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13876881930 + 13876881931.

It is an arithmetic number, because the mean of its divisors is an integer number (13876881931).

Almost surely, 2^27753763861 is an apocalyptic number.

It is an amenable number.

27753763861 is a deficient number, since it is larger than the sum of its proper divisors (1).

27753763861 is an equidigital number, since it uses as much as digits as its factorization.

27753763861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 55.

The spelling of 27753763861 in words is "twenty-seven billion, seven hundred fifty-three million, seven hundred sixty-three thousand, eight hundred sixty-one".