27772043081 has 16 divisors (see below), whose sum is σ = 30154348224. Its totient is φ = 25475541504.

The previous prime is 27772043041. The next prime is 27772043137. The reversal of 27772043081 is 18034027772.

It is a cyclic number.

It is not a de Polignac number, because 27772043081 - 2⁶ = 27772043017 is a prime.

It is a super-2 number, since 2×27772043081² (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 (27772043011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300701 + ... + 382053.

It is an arithmetic number, because the mean of its divisors is an integer number (1884646764).

Almost surely, 2^27772043081 is an apocalyptic number.

It is an amenable number.

27772043081 is a deficient number, since it is larger than the sum of its proper divisors (2382305143).

27772043081 is a wasteful number, since it uses less digits than its factorization.

27772043081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81880.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 27772043081 in words is "twenty-seven billion, seven hundred seventy-two million, forty-three thousand, eighty-one".