540664204544 has 54 divisors (see below), whose sum is σ = 1128179282706. Its totient is φ = 258578467840.

The previous prime is 540664204541. The next prime is 540664204601. The reversal of 540664204544 is 445402466045.

It can be written as a sum of positive squares in only one way, i.e., 493523110144 + 47141094400 = 702512^2 + 217120^2 .

It is a junction number, because it is equal to n+sod(n) for n = 540664204495 and 540664204504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540664204541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1860767 + ... + 2131614.

It is an arithmetic number, because the mean of its divisors is an integer number (20892208939).

Almost surely, 2^540664204544 is an apocalyptic number.

It is an amenable number.

540664204544 is an abundant number, since it is smaller than the sum of its proper divisors (587515078162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

540664204544 is an equidigital number, since it uses as much as digits as its factorization.

540664204544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992443 (or 3992406 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 44.

The spelling of 540664204544 in words is "five hundred forty billion, six hundred sixty-four million, two hundred four thousand, five hundred forty-four".