12423741872781 has 8 divisors (see below), whose sum is σ = 17436830698720. Its totient is φ = 7846573814352.

The previous prime is 12423741872777. The next prime is 12423741872797. The reversal of 12423741872781 is 18727814732421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12423741872781 - 2² = 12423741872777 is a prime.

It is a super-2 number, since 2×12423741872781² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 217960383733 = 12423741872781 / (1 + 2 + 4 + 2 + 3 + 7 + 4 + 1 + 8 + 7 + 2 + 7 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423741872741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108980191810 + ... + 108980191923.

It is an arithmetic number, because the mean of its divisors is an integer number (2179603837340).

Almost surely, 2^{12423741872781} is an apocalyptic number.

It is an amenable number.

12423741872781 is a deficient number, since it is larger than the sum of its proper divisors (5013088825939).

12423741872781 is a wasteful number, since it uses less digits than its factorization.

12423741872781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217960383755.

The product of its digits is 8429568, while the sum is 57.

The spelling of 12423741872781 in words is "twelve trillion, four hundred twenty-three billion, seven hundred forty-one million, eight hundred seventy-two thousand, seven hundred eighty-one".