12491373434 has 4 divisors (see below), whose sum is σ = 18737060154. Its totient is φ = 6245686716.

The previous prime is 12491373413. The next prime is 12491373467. The reversal of 12491373434 is 43437319421.

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

It can be written as a sum of positive squares in only one way, i.e., 12398154409 + 93219025 = 111347^2 + 9655^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12491373391 and 12491373400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3122843357 + ... + 3122843360.

Almost surely, 2^12491373434 is an apocalyptic number.

12491373434 is a deficient number, since it is larger than the sum of its proper divisors (6245686720).

12491373434 is an equidigital number, since it uses as much as digits as its factorization.

12491373434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245686719.

The product of its digits is 217728, while the sum is 41.

The spelling of 12491373434 in words is "twelve billion, four hundred ninety-one million, three hundred seventy-three thousand, four hundred thirty-four".