12578439137 has 4 divisors (see below), whose sum is σ = 13721933616. Its totient is φ = 11434944660.

The previous prime is 12578439127. The next prime is 12578439143. The reversal of 12578439137 is 73193487521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12578439137 - 2⁴ = 12578439121 is a prime.

It is a super-2 number, since 2×12578439137² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12578439127) 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, 571747223 + ... + 571747244.

It is an arithmetic number, because the mean of its divisors is an integer number (3430483404).

Almost surely, 2^12578439137 is an apocalyptic number.

It is an amenable number.

12578439137 is a deficient number, since it is larger than the sum of its proper divisors (1143494479).

12578439137 is a wasteful number, since it uses less digits than its factorization.

12578439137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143494478.

The product of its digits is 1270080, while the sum is 50.

The spelling of 12578439137 in words is "twelve billion, five hundred seventy-eight million, four hundred thirty-nine thousand, one hundred thirty-seven".