538847661 has 24 divisors (see below), whose sum is σ = 798983136. Its totient is φ = 320357440.

The previous prime is 538847651. The next prime is 538847669. The reversal of 538847661 is 166748835.

It is not a de Polignac number, because 538847661 - 2⁵ = 538847629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 538847661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538847669) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 89791 + ... + 95603.

It is an arithmetic number, because the mean of its divisors is an integer number (33290964).

Almost surely, 2^538847661 is an apocalyptic number.

It is an amenable number.

538847661 is a deficient number, since it is larger than the sum of its proper divisors (260135475).

538847661 is a wasteful number, since it uses less digits than its factorization.

538847661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933 (or 5880 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 538847661 is about 23213.0924480130. The cubic root of 538847661 is about 813.7456262964.

The spelling of 538847661 in words is "five hundred thirty-eight million, eight hundred forty-seven thousand, six hundred sixty-one".