540621544 has 16 divisors (see below), whose sum is σ = 1013948100. Its totient is φ = 270235392.

The previous prime is 540621533. The next prime is 540621547. The reversal of 540621544 is 445126045.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 390852900 + 149768644 = 19770^2 + 12238^2 .

It is not an unprimeable number, because it can be changed into a prime (540621547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31522 + ... + 45550.

Almost surely, 2^540621544 is an apocalyptic number.

It is an amenable number.

540621544 is a deficient number, since it is larger than the sum of its proper divisors (473326556).

540621544 is a wasteful number, since it uses less digits than its factorization.

540621544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18852 (or 18848 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 540621544 is about 23251.2697287697. The cubic root of 540621544 is about 814.6375966631.

Adding to 540621544 its reverse (445126045), we get a palindrome (985747589).

The spelling of 540621544 in words is "five hundred forty million, six hundred twenty-one thousand, five hundred forty-four".