12689250931438 has 4 divisors (see below), whose sum is σ = 19033876397160. Its totient is φ = 6344625465718.

The previous prime is 12689250931429. The next prime is 12689250931459. The reversal of 12689250931438 is 83413905298621.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×12689250931438² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3172312732858 + ... + 3172312732861.

It is an arithmetic number, because the mean of its divisors is an integer number (4758469099290).

Almost surely, 2^{12689250931438} is an apocalyptic number.

12689250931438 is a deficient number, since it is larger than the sum of its proper divisors (6344625465722).

12689250931438 is an equidigital number, since it uses as much as digits as its factorization.

12689250931438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344625465721.

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 12689250931438 in words is "twelve trillion, six hundred eighty-nine billion, two hundred fifty million, nine hundred thirty-one thousand, four hundred thirty-eight".