12381722541 has 12 divisors (see below), whose sum is σ = 18004743900. Its totient is φ = 8199081600.

The previous prime is 12381722539. The next prime is 12381722611. The reversal of 12381722541 is 14522718321.

12381722541 is a `hidden beast` number, since 1 + 238 + 172 + 254 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2942628516 + 9439094025 = 54246^2 + 97155^2 .

It is not a de Polignac number, because 12381722541 - 2¹ = 12381722539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12381722496 and 12381722505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381724541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4615260 + ... + 4617941.

It is an arithmetic number, because the mean of its divisors is an integer number (1500395325).

Almost surely, 2^12381722541 is an apocalyptic number.

It is an amenable number.

12381722541 is a deficient number, since it is larger than the sum of its proper divisors (5623021359).

12381722541 is a wasteful number, since it uses less digits than its factorization.

12381722541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233356 (or 9233353 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The spelling of 12381722541 in words is "twelve billion, three hundred eighty-one million, seven hundred twenty-two thousand, five hundred forty-one".