27391776245 has 4 divisors (see below), whose sum is σ = 32870131500. Its totient is φ = 21913420992.

The previous prime is 27391776233. The next prime is 27391776281. The reversal of 27391776245 is 54267719372.

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 8657558116 + 18734218129 = 93046^2 + 136873^2 .

It is a cyclic number.

It is not a de Polignac number, because 27391776245 - 2⁴ = 27391776229 is a prime.

It is a super-2 number, since 2×27391776245² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739177620 + ... + 2739177629.

It is an arithmetic number, because the mean of its divisors is an integer number (8217532875).

Almost surely, 2^27391776245 is an apocalyptic number.

It is an amenable number.

27391776245 is a deficient number, since it is larger than the sum of its proper divisors (5478355255).

27391776245 is an equidigital number, since it uses as much as digits as its factorization.

27391776245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478355254.

The product of its digits is 4445280, while the sum is 53.

The spelling of 27391776245 in words is "twenty-seven billion, three hundred ninety-one million, seven hundred seventy-six thousand, two hundred forty-five".