541749782781 has 24 divisors (see below), whose sum is σ = 799251373440. Its totient is φ = 353449225536.

The previous prime is 541749782741. The next prime is 541749782869. The reversal of 541749782781 is 187287947145.

541749782781 is a `hidden beast` number, since 5 + 41 + 7 + 497 + 8 + 27 + 81 = 666.

It is not a de Polignac number, because 541749782781 - 2¹⁵ = 541749750013 is a prime.

It is a super-2 number, since 2×541749782781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541749782711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4996561 + ... + 5103833.

It is an arithmetic number, because the mean of its divisors is an integer number (33302140560).

Almost surely, 2^541749782781 is an apocalyptic number.

It is an amenable number.

541749782781 is a deficient number, since it is larger than the sum of its proper divisors (257501590659).

541749782781 is a wasteful number, since it uses less digits than its factorization.

541749782781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119265 (or 119262 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 63.

The spelling of 541749782781 in words is "five hundred forty-one billion, seven hundred forty-nine million, seven hundred eighty-two thousand, seven hundred eighty-one".