27355518769 has 2 divisors, whose sum is σ = 27355518770. Its totient is φ = 27355518768.

The previous prime is 27355518767. The next prime is 27355518797. The reversal of 27355518769 is 96781555372.

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., 20195820544 + 7159698225 = 142112^2 + 84615^2 .

It is a cyclic number.

It is not a de Polignac number, because 27355518769 - 2¹ = 27355518767 is a prime.

It is a super-2 number, since 2×27355518769² (a number of 22 digits) contains 22 as substring.

Together with 27355518767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27355518767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13677759384 + 13677759385.

It is an arithmetic number, because the mean of its divisors is an integer number (13677759385).

Almost surely, 2^27355518769 is an apocalyptic number.

It is an amenable number.

27355518769 is a deficient number, since it is larger than the sum of its proper divisors (1).

27355518769 is an equidigital number, since it uses as much as digits as its factorization.

27355518769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876000, while the sum is 58.

The spelling of 27355518769 in words is "twenty-seven billion, three hundred fifty-five million, five hundred eighteen thousand, seven hundred sixty-nine".