27771640201 has 4 divisors (see below), whose sum is σ = 27773302032. Its totient is φ = 27769978372.

The previous prime is 27771640159. The next prime is 27771640207. The reversal of 27771640201 is 10204617772.

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 27771640201 - 2⁹ = 27771639689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27771640207) 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, 805591 + ... + 839356.

It is an arithmetic number, because the mean of its divisors is an integer number (6943325508).

Almost surely, 2^27771640201 is an apocalyptic number.

It is an amenable number.

27771640201 is a deficient number, since it is larger than the sum of its proper divisors (1661831).

27771640201 is a wasteful number, since it uses less digits than its factorization.

27771640201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661830.

The product of its (nonzero) digits is 32928, while the sum is 37.

The spelling of 27771640201 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty thousand, two hundred one".