27773312831 has 8 divisors (see below), whose sum is σ = 30548558928. Its totient is φ = 25248465000.

The previous prime is 27773312813. The next prime is 27773312837. The reversal of 27773312831 is 13821337772.

It is a de Polignac number, because none of the positive numbers 2^k-27773312831 is a prime.

It is a super-2 number, since 2×27773312831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27773312837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10431920 + ... + 10434581.

It is an arithmetic number, because the mean of its divisors is an integer number (3818569866).

Almost surely, 2^27773312831 is an apocalyptic number.

27773312831 is a deficient number, since it is larger than the sum of its proper divisors (2775246097).

27773312831 is an equidigital number, since it uses as much as digits as its factorization.

27773312831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20866534 (or 20866512 counting only the distinct ones).

The product of its digits is 296352, while the sum is 44.

The spelling of 27773312831 in words is "twenty-seven billion, seven hundred seventy-three million, three hundred twelve thousand, eight hundred thirty-one".