541818818091 has 20 divisors (see below), whose sum is σ = 844574263632. Its totient is φ = 345507650928.

The previous prime is 541818818083. The next prime is 541818818113. The reversal of 541818818091 is 190818818145.

541818818091 is a `hidden beast` number, since 541 + 8 + 1 + 8 + 8 + 1 + 8 + 0 + 91 = 666.

It is not a de Polignac number, because 541818818091 - 2³ = 541818818083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (541818818041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145413816 + ... + 145417541.

Almost surely, 2^541818818091 is an apocalyptic number.

541818818091 is a deficient number, since it is larger than the sum of its proper divisors (302755445541).

541818818091 is a wasteful number, since it uses less digits than its factorization.

541818818091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290831392 (or 290831383 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 54.

Adding to 541818818091 its sum of digits (54), we get a palindrome (541818818145).

The spelling of 541818818091 in words is "five hundred forty-one billion, eight hundred eighteen million, eight hundred eighteen thousand, ninety-one".