538182661 has 4 divisors (see below), whose sum is σ = 555543424. Its totient is φ = 520821900.

The previous prime is 538182647. The next prime is 538182679. The reversal of 538182661 is 166281835.

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.

It is a cyclic number.

It is not a de Polignac number, because 538182661 - 2¹⁷ = 538051589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538182611) 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, 8680335 + ... + 8680396.

It is an arithmetic number, because the mean of its divisors is an integer number (138885856).

Almost surely, 2^538182661 is an apocalyptic number.

It is an amenable number.

538182661 is a deficient number, since it is larger than the sum of its proper divisors (17360763).

538182661 is a wasteful number, since it uses less digits than its factorization.

538182661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17360762.

The product of its digits is 69120, while the sum is 40.

The square root of 538182661 is about 23198.7642127765. The cubic root of 538182661 is about 813.4107365904.

The spelling of 538182661 in words is "five hundred thirty-eight million, one hundred eighty-two thousand, six hundred sixty-one".