27200445661 has 4 divisors (see below), whose sum is σ = 28077879424. Its totient is φ = 26323011900.

The previous prime is 27200445653. The next prime is 27200445673. The reversal of 27200445661 is 16654400272.

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 27200445661 - 2³ = 27200445653 is a prime.

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 27200445661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27200445611) 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, 438716835 + ... + 438716896.

It is an arithmetic number, because the mean of its divisors is an integer number (7019469856).

Almost surely, 2^27200445661 is an apocalyptic number.

It is an amenable number.

27200445661 is a deficient number, since it is larger than the sum of its proper divisors (877433763).

27200445661 is an equidigital number, since it uses as much as digits as its factorization.

27200445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877433762.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 27200445661 in words is "twenty-seven billion, two hundred million, four hundred forty-five thousand, six hundred sixty-one".