27747606245 has 4 divisors (see below), whose sum is σ = 33297127500. Its totient is φ = 22198084992.

The previous prime is 27747606217. The next prime is 27747606283. The reversal of 27747606245 is 54260674772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5681692129 + 22065914116 = 75377^2 + 148546^2 .

It is a cyclic number.

It is not a de Polignac number, because 27747606245 - 2¹² = 27747602149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27747606193 and 27747606202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774760620 + ... + 2774760629.

It is an arithmetic number, because the mean of its divisors is an integer number (8324281875).

Almost surely, 2^27747606245 is an apocalyptic number.

It is an amenable number.

27747606245 is a deficient number, since it is larger than the sum of its proper divisors (5549521255).

27747606245 is an equidigital number, since it uses as much as digits as its factorization.

27747606245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549521254.

The product of its (nonzero) digits is 3951360, while the sum is 50.

The spelling of 27747606245 in words is "twenty-seven billion, seven hundred forty-seven million, six hundred six thousand, two hundred forty-five".