540615644 has 24 divisors (see below), whose sum is σ = 999720960. Its totient is φ = 255279024.

The previous prime is 540615631. The next prime is 540615661. The reversal of 540615644 is 446516045.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29924 + ... + 44459.

It is an arithmetic number, because the mean of its divisors is an integer number (41655040).

Almost surely, 2^540615644 is an apocalyptic number.

It is an amenable number.

540615644 is a deficient number, since it is larger than the sum of its proper divisors (459105316).

540615644 is a wasteful number, since it uses less digits than its factorization.

540615644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74489 (or 74487 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 540615644 is about 23251.1428536319. The cubic root of 540615644 is about 814.6346331733.

The spelling of 540615644 in words is "five hundred forty million, six hundred fifteen thousand, six hundred forty-four".