27161851945 has 16 divisors (see below), whose sum is σ = 34792951680. Its totient is φ = 20295878400.

The previous prime is 27161851943. The next prime is 27161851991. The reversal of 27161851945 is 54915816172.

It is not a de Polignac number, because 27161851945 - 2¹ = 27161851943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27161851943) 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, 2006736 + ... + 2020225.

It is an arithmetic number, because the mean of its divisors is an integer number (2174559480).

Almost surely, 2^27161851945 is an apocalyptic number.

It is an amenable number.

27161851945 is a deficient number, since it is larger than the sum of its proper divisors (7631099735).

27161851945 is a wasteful number, since it uses less digits than its factorization.

27161851945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027056.

The product of its digits is 604800, while the sum is 49.

The spelling of 27161851945 in words is "twenty-seven billion, one hundred sixty-one million, eight hundred fifty-one thousand, nine hundred forty-five".