27747522045 has 24 divisors (see below), whose sum is σ = 49754179800. Its totient is φ = 14288378496.

The previous prime is 27747522037. The next prime is 27747522091. The reversal of 27747522045 is 54022574772.

It can be written as a sum of positive squares in 4 ways, for example, as 2143041849 + 25604480196 = 46293^2 + 160014^2 .

It is not a de Polignac number, because 27747522045 - 2³ = 27747522037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10629930 + ... + 10632539.

It is an arithmetic number, because the mean of its divisors is an integer number (2073090825).

Almost surely, 2^27747522045 is an apocalyptic number.

It is an amenable number.

27747522045 is a deficient number, since it is larger than the sum of its proper divisors (22006657755).

27747522045 is a wasteful number, since it uses less digits than its factorization.

27747522045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21262509 (or 21262506 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 45.

The spelling of 27747522045 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred twenty-two thousand, forty-five".