27426441561 has 4 divisors (see below), whose sum is σ = 36568588752. Its totient is φ = 18284294372.

The previous prime is 27426441541. The next prime is 27426441569. The reversal of 27426441561 is 16514462472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27426441561 - 2¹⁹ = 27425917273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27426441569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4571073591 + ... + 4571073596.

It is an arithmetic number, because the mean of its divisors is an integer number (9142147188).

Almost surely, 2^27426441561 is an apocalyptic number.

It is an amenable number.

27426441561 is a deficient number, since it is larger than the sum of its proper divisors (9142147191).

27426441561 is an equidigital number, since it uses as much as digits as its factorization.

27426441561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142147190.

The product of its digits is 322560, while the sum is 42.

The spelling of 27426441561 in words is "twenty-seven billion, four hundred twenty-six million, four hundred forty-one thousand, five hundred sixty-one".