54081185681 has 4 divisors (see below), whose sum is σ = 54081789732. Its totient is φ = 54080581632.

The previous prime is 54081185651. The next prime is 54081185701. The reversal of 54081185681 is 18658118045.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19157051281 + 34924134400 = 138409^2 + 186880^2 .

It is a cyclic number.

It is not a de Polignac number, because 54081185681 - 2⁶ = 54081185617 is a prime.

It is a super-2 number, since 2×54081185681² (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 (54081185651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138056 + ... + 356681.

It is an arithmetic number, because the mean of its divisors is an integer number (13520447433).

Almost surely, 2^54081185681 is an apocalyptic number.

It is an amenable number.

54081185681 is a deficient number, since it is larger than the sum of its proper divisors (604051).

54081185681 is a wasteful number, since it uses less digits than its factorization.

54081185681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604050.

The product of its (nonzero) digits is 307200, while the sum is 47.

The spelling of 54081185681 in words is "fifty-four billion, eighty-one million, one hundred eighty-five thousand, six hundred eighty-one".