27253981660591 has 6 divisors (see below), whose sum is σ = 31703611319520. Its totient is φ = 23360555709036.

The previous prime is 27253981660483. The next prime is 27253981660601. The reversal of 27253981660591 is 19506618935272.

It is not a de Polignac number, because 27253981660591 - 2²³ = 27253973271983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27253681660591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278101853631 + ... + 278101853728.

It is an arithmetic number, because the mean of its divisors is an integer number (5283935219920).

Almost surely, 2^{27253981660591} is an apocalyptic number.

27253981660591 is a deficient number, since it is larger than the sum of its proper divisors (4449629658929).

27253981660591 is an equidigital number, since it uses as much as digits as its factorization.

27253981660591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556203707373 (or 556203707366 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 64.

The spelling of 27253981660591 in words is "twenty-seven trillion, two hundred fifty-three billion, nine hundred eighty-one million, six hundred sixty thousand, five hundred ninety-one".