12379497781 has 16 divisors (see below), whose sum is σ = 14190131200. Its totient is φ = 10579448880.

The previous prime is 12379497763. The next prime is 12379497803. The reversal of 12379497781 is 18779497321.

It is a happy number.

It is not a de Polignac number, because 12379497781 - 2⁹ = 12379497269 is a prime.

It is a super-2 number, since 2×12379497781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12379497731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5355616 + ... + 5357926.

It is an arithmetic number, because the mean of its divisors is an integer number (886883200).

Almost surely, 2^12379497781 is an apocalyptic number.

It is an amenable number.

12379497781 is a deficient number, since it is larger than the sum of its proper divisors (1810633419).

12379497781 is a wasteful number, since it uses less digits than its factorization.

12379497781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264.

The product of its digits is 5334336, while the sum is 58.

The spelling of 12379497781 in words is "twelve billion, three hundred seventy-nine million, four hundred ninety-seven thousand, seven hundred eighty-one".