12027400639 has 4 divisors (see below), whose sum is σ = 12196800720. Its totient is φ = 11858000560.

The previous prime is 12027400607. The next prime is 12027400643. The reversal of 12027400639 is 93600472021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93600472021 = 7 ⋅13371496003.

It is a cyclic number.

It is not a de Polignac number, because 12027400639 - 2⁵ = 12027400607 is a prime.

It is a super-2 number, since 2×12027400639² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12027400039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84699934 + ... + 84700075.

It is an arithmetic number, because the mean of its divisors is an integer number (3049200180).

Almost surely, 2^12027400639 is an apocalyptic number.

12027400639 is a deficient number, since it is larger than the sum of its proper divisors (169400081).

12027400639 is an equidigital number, since it uses as much as digits as its factorization.

12027400639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169400080.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 12027400639 in words is "twelve billion, twenty-seven million, four hundred thousand, six hundred thirty-nine".