540166491 has 12 divisors (see below), whose sum is σ = 780816400. Its totient is φ = 359845200.

The previous prime is 540166469. The next prime is 540166511. The reversal of 540166491 is 194661045.

540166491 is a `hidden beast` number, since 5 + 4 + 0 + 1 + 6 + 649 + 1 = 666.

It is not a de Polignac number, because 540166491 - 2⁶ = 540166427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540166421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8860 + ... + 34041.

Almost surely, 2^540166491 is an apocalyptic number.

540166491 is a deficient number, since it is larger than the sum of its proper divisors (240649909).

540166491 is a wasteful number, since it uses less digits than its factorization.

540166491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44306 (or 44303 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 540166491 is about 23241.4821171112. The cubic root of 540166491 is about 814.4089663981.

The spelling of 540166491 in words is "five hundred forty million, one hundred sixty-six thousand, four hundred ninety-one".