12699126791 has 8 divisors (see below), whose sum is σ = 14045604384. Its totient is φ = 11405452320.

The previous prime is 12699126757. The next prime is 12699126809. The reversal of 12699126791 is 19762199621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12699126791 - 2²² = 12694932487 is a prime.

It is a super-2 number, since 2×12699126791² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12699126721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13200275 + ... + 13201236.

It is an arithmetic number, because the mean of its divisors is an integer number (1755700548).

Almost surely, 2^12699126791 is an apocalyptic number.

12699126791 is a deficient number, since it is larger than the sum of its proper divisors (1346477593).

12699126791 is a wasteful number, since it uses less digits than its factorization.

12699126791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26401561.

The product of its digits is 734832, while the sum is 53.

The spelling of 12699126791 in words is "twelve billion, six hundred ninety-nine million, one hundred twenty-six thousand, seven hundred ninety-one".