27311801477 has 4 divisors (see below), whose sum is σ = 27827118540. Its totient is φ = 26796484416.

The previous prime is 27311801449. The next prime is 27311801527. The reversal of 27311801477 is 77410811372.

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 21762445441 + 5549356036 = 147521^2 + 74494^2 .

It is a cyclic number.

It is not a de Polignac number, because 27311801477 - 2¹⁴ = 27311785093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27311801417) 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, 257658452 + ... + 257658557.

It is an arithmetic number, because the mean of its divisors is an integer number (6956779635).

Almost surely, 2^27311801477 is an apocalyptic number.

It is an amenable number.

27311801477 is a deficient number, since it is larger than the sum of its proper divisors (515317063).

27311801477 is an equidigital number, since it uses as much as digits as its factorization.

27311801477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515317062.

The product of its (nonzero) digits is 65856, while the sum is 41.

The spelling of 27311801477 in words is "twenty-seven billion, three hundred eleven million, eight hundred one thousand, four hundred seventy-seven".