12439417761 has 24 divisors (see below), whose sum is σ = 18363346560. Its totient is φ = 8110750176.

The previous prime is 12439417729. The next prime is 12439417799. The reversal of 12439417761 is 16771493421.

It is a happy number.

It is not a de Polignac number, because 12439417761 - 2⁵ = 12439417729 is a prime.

It is a super-2 number, since 2×12439417761² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12439410761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 634575 + ... + 653883.

It is an arithmetic number, because the mean of its divisors is an integer number (765139440).

Almost surely, 2^12439417761 is an apocalyptic number.

It is an amenable number.

12439417761 is a deficient number, since it is larger than the sum of its proper divisors (5923928799).

12439417761 is a wasteful number, since it uses less digits than its factorization.

12439417761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20885 (or 20882 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The spelling of 12439417761 in words is "twelve billion, four hundred thirty-nine million, four hundred seventeen thousand, seven hundred sixty-one".