540902549 has 12 divisors (see below), whose sum is σ = 629521452. Its totient is φ = 462802560.

The previous prime is 540902513. The next prime is 540902561. The reversal of 540902549 is 945209045.

It can be written as a sum of positive squares in 2 ways, for example, as 154504900 + 386397649 = 12430^2 + 19657^2 .

It is a de Polignac number, because none of the positive numbers 2^k-540902549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540902449) 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, 129422 + ... + 133535.

It is an arithmetic number, because the mean of its divisors is an integer number (52460121).

Almost surely, 2^540902549 is an apocalyptic number.

It is an amenable number.

540902549 is a deficient number, since it is larger than the sum of its proper divisors (88618903).

540902549 is a wasteful number, since it uses less digits than its factorization.

540902549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262996 (or 262985 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 540902549 is about 23257.3117320124. The cubic root of 540902549 is about 814.7787166940.

The spelling of 540902549 in words is "five hundred forty million, nine hundred two thousand, five hundred forty-nine".