27793972281 has 16 divisors (see below), whose sum is σ = 38425640960. Its totient is φ = 17851170960.

The previous prime is 27793972279. The next prime is 27793972291. The reversal of 27793972281 is 18227939772.

It is not a de Polignac number, because 27793972281 - 2¹ = 27793972279 is a prime.

It is a super-2 number, since 2×27793972281² (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 (27793972291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649351 + ... + 690828.

It is an arithmetic number, because the mean of its divisors is an integer number (2401602560).

Almost surely, 2^27793972281 is an apocalyptic number.

It is an amenable number.

27793972281 is a deficient number, since it is larger than the sum of its proper divisors (10631668679).

27793972281 is a wasteful number, since it uses less digits than its factorization.

27793972281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340436.

The product of its digits is 5334336, while the sum is 57.

The spelling of 27793972281 in words is "twenty-seven billion, seven hundred ninety-three million, nine hundred seventy-two thousand, two hundred eighty-one".