27731840881 has 8 divisors (see below), whose sum is σ = 28747535040. Its totient is φ = 26730156528.

The previous prime is 27731840879. The next prime is 27731840897. The reversal of 27731840881 is 18804813772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27731840881 - 2¹ = 27731840879 is a prime.

It is a super-2 number, since 2×27731840881² (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 (27731840831) 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, 3498421 + ... + 3506338.

It is an arithmetic number, because the mean of its divisors is an integer number (3593441880).

Almost surely, 2^27731840881 is an apocalyptic number.

It is an amenable number.

27731840881 is a deficient number, since it is larger than the sum of its proper divisors (1015694159).

27731840881 is a wasteful number, since it uses less digits than its factorization.

27731840881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004903.

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 27731840881 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred forty thousand, eight hundred eighty-one".