27205441561 has 8 divisors (see below), whose sum is σ = 27669454560. Its totient is φ = 26741525472.

The previous prime is 27205441489. The next prime is 27205441579. The reversal of 27205441561 is 16514450272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27205441561 - 2¹³ = 27205433369 is a prime.

It is a super-2 number, since 2×27205441561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27205441561.

It is not an unprimeable number, because it can be changed into a prime (27205441661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751861 + ... + 787213.

It is an arithmetic number, because the mean of its divisors is an integer number (3458681820).

Almost surely, 2^27205441561 is an apocalyptic number.

It is an amenable number.

27205441561 is a deficient number, since it is larger than the sum of its proper divisors (464012999).

27205441561 is a wasteful number, since it uses less digits than its factorization.

27205441561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48455.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 27205441561 in words is "twenty-seven billion, two hundred five million, four hundred forty-one thousand, five hundred sixty-one".