540433981161 has 24 divisors (see below), whose sum is σ = 805856070656. Its totient is φ = 348646446720.

The previous prime is 540433981103. The next prime is 540433981169. The reversal of 540433981161 is 161189334045.

540433981161 is a `hidden beast` number, since 5 + 404 + 3 + 3 + 9 + 81 + 161 = 666.

It is not a de Polignac number, because 540433981161 - 2⁹ = 540433980649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540433981169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5698416 + ... + 5792478.

Almost surely, 2^540433981161 is an apocalyptic number.

It is an amenable number.

540433981161 is a deficient number, since it is larger than the sum of its proper divisors (265422089495).

540433981161 is a wasteful number, since it uses less digits than its factorization.

540433981161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114693 (or 114690 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 540433981161 in words is "five hundred forty billion, four hundred thirty-three million, nine hundred eighty-one thousand, one hundred sixty-one".