27777674881 has 6 divisors (see below), whose sum is σ = 30532485746. Its totient is φ = 25252431600.

The previous prime is 27777674863. The next prime is 27777674933. The reversal of 27777674881 is 18847677772.

It can be written as a sum of positive squares in only one way, i.e., 19651553856 + 8126121025 = 140184^2 + 90145^2 .

It is not a de Polignac number, because 27777674881 - 2⁵ = 27777674849 is a prime.

It is a super-2 number, since 2×27777674881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27777674801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114783660 + ... + 114783901.

Almost surely, 2^27777674881 is an apocalyptic number.

It is an amenable number.

27777674881 is a deficient number, since it is larger than the sum of its proper divisors (2754810865).

27777674881 is a wasteful number, since it uses less digits than its factorization.

27777674881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229567583 (or 229567572 counting only the distinct ones).

The product of its digits is 51631104, while the sum is 64.

The spelling of 27777674881 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-four thousand, eight hundred eighty-one".