12491233579 has 4 divisors (see below), whose sum is σ = 13626800280. Its totient is φ = 11355666880.

The previous prime is 12491233577. The next prime is 12491233583. The reversal of 12491233579 is 97533219421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12491233579 - 2¹ = 12491233577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12491233577) 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, 567783334 + ... + 567783355.

It is an arithmetic number, because the mean of its divisors is an integer number (3406700070).

Almost surely, 2^12491233579 is an apocalyptic number.

12491233579 is a deficient number, since it is larger than the sum of its proper divisors (1135566701).

12491233579 is a wasteful number, since it uses less digits than its factorization.

12491233579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135566700.

The product of its digits is 408240, while the sum is 46.

The spelling of 12491233579 in words is "twelve billion, four hundred ninety-one million, two hundred thirty-three thousand, five hundred seventy-nine".