538542561 has 8 divisors (see below), whose sum is σ = 718704064. Its totient is φ = 358704720.

The previous prime is 538542559. The next prime is 538542577. The reversal of 538542561 is 165245835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 538542561 - 2¹ = 538542559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538542551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77005 + ... + 83706.

It is an arithmetic number, because the mean of its divisors is an integer number (89838008).

Almost surely, 2^538542561 is an apocalyptic number.

It is an amenable number.

538542561 is a deficient number, since it is larger than the sum of its proper divisors (180161503).

538542561 is a wasteful number, since it uses less digits than its factorization.

538542561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161831.

The product of its digits is 144000, while the sum is 39.

The square root of 538542561 is about 23206.5197950921. The cubic root of 538542561 is about 813.5920141338.

The spelling of 538542561 in words is "five hundred thirty-eight million, five hundred forty-two thousand, five hundred sixty-one".