540739661 has 16 divisors (see below), whose sum is σ = 685601280. Its totient is φ = 414210480.

The previous prime is 540739657. The next prime is 540739673. The reversal of 540739661 is 166937045.

It is a cyclic number.

It is not a de Polignac number, because 540739661 - 2² = 540739657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540739261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54971 + ... + 64056.

It is an arithmetic number, because the mean of its divisors is an integer number (42850080).

Almost surely, 2^540739661 is an apocalyptic number.

It is an amenable number.

540739661 is a deficient number, since it is larger than the sum of its proper divisors (144861619).

540739661 is a wasteful number, since it uses less digits than its factorization.

540739661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119104.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 540739661 is about 23253.8096018695. The cubic root of 540739661 is about 814.6969206907.

The spelling of 540739661 in words is "five hundred forty million, seven hundred thirty-nine thousand, six hundred sixty-one".