540644645 has 4 divisors (see below), whose sum is σ = 648773580. Its totient is φ = 432515712.

The previous prime is 540644627. The next prime is 540644701. The reversal of 540644645 is 546446045.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215707969 + 324936676 = 14687^2 + 18026^2 .

It is a cyclic number.

It is not a de Polignac number, because 540644645 - 2¹² = 540640549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 540644599 and 540644608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54064460 + ... + 54064469.

It is an arithmetic number, because the mean of its divisors is an integer number (162193395).

Almost surely, 2^540644645 is an apocalyptic number.

It is an amenable number.

540644645 is a deficient number, since it is larger than the sum of its proper divisors (108128935).

540644645 is a wasteful number, since it uses less digits than its factorization.

540644645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108128934.

The product of its (nonzero) digits is 230400, while the sum is 38.

The square root of 540644645 is about 23251.7664920324. The cubic root of 540644645 is about 814.6491997739.

The spelling of 540644645 in words is "five hundred forty million, six hundred forty-four thousand, six hundred forty-five".