540361649 has 4 divisors (see below), whose sum is σ = 540417264. Its totient is φ = 540306036.

The previous prime is 540361637. The next prime is 540361667. The reversal of 540361649 is 946163045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 540361649 - 2¹² = 540357553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540361699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8987 + ... + 34080.

It is an arithmetic number, because the mean of its divisors is an integer number (135104316).

Almost surely, 2^540361649 is an apocalyptic number.

It is an amenable number.

540361649 is a deficient number, since it is larger than the sum of its proper divisors (55615).

540361649 is a wasteful number, since it uses less digits than its factorization.

540361649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55614.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 540361649 is about 23245.6802223553. The cubic root of 540361649 is about 814.5070344879.

The spelling of 540361649 in words is "five hundred forty million, three hundred sixty-one thousand, six hundred forty-nine".