27735774757 has 2 divisors, whose sum is σ = 27735774758. Its totient is φ = 27735774756.

The previous prime is 27735774733. The next prime is 27735774769. The reversal of 27735774757 is 75747753772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20634173316 + 7101601441 = 143646^2 + 84271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27735774757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27735774695 and 27735774704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27735774557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13867887378 + 13867887379.

It is an arithmetic number, because the mean of its divisors is an integer number (13867887379).

Almost surely, 2^27735774757 is an apocalyptic number.

It is an amenable number.

27735774757 is a deficient number, since it is larger than the sum of its proper divisors (1).

27735774757 is an equidigital number, since it uses as much as digits as its factorization.

27735774757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70589400, while the sum is 61.

The spelling of 27735774757 in words is "twenty-seven billion, seven hundred thirty-five million, seven hundred seventy-four thousand, seven hundred fifty-seven".