27985226971 has 18 divisors (see below), whose sum is σ = 30429521820. Its totient is φ = 25725379680.

The previous prime is 27985226959. The next prime is 27985226989. The reversal of 27985226971 is 17962258972.

It is not a de Polignac number, because 27985226971 - 2¹¹ = 27985224923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27985223971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 42337381 + ... + 42338041.

It is an arithmetic number, because the mean of its divisors is an integer number (1690528990).

Almost surely, 2^27985226971 is an apocalyptic number.

27985226971 is a deficient number, since it is larger than the sum of its proper divisors (2444294849).

27985226971 is an frugal number, since it uses more digits than its factorization.

27985226971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1053 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 58.

The spelling of 27985226971 in words is "twenty-seven billion, nine hundred eighty-five million, two hundred twenty-six thousand, nine hundred seventy-one".