540743661 has 16 divisors (see below), whose sum is σ = 801542400. Its totient is φ = 360297504.

The previous prime is 540743627. The next prime is 540743663. The reversal of 540743661 is 166347045.

It is a happy number.

It is not a de Polignac number, because 540743661 - 2¹⁰ = 540742637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540743663) 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, 57660 + ... + 66378.

It is an arithmetic number, because the mean of its divisors is an integer number (50096400).

Almost surely, 2^540743661 is an apocalyptic number.

It is an amenable number.

540743661 is a deficient number, since it is larger than the sum of its proper divisors (260798739).

540743661 is a wasteful number, since it uses less digits than its factorization.

540743661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11025 (or 11019 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 540743661 is about 23253.8956091232. The cubic root of 540743661 is about 814.6989295315.

The spelling of 540743661 in words is "five hundred forty million, seven hundred forty-three thousand, six hundred sixty-one".