12706619391 has 16 divisors (see below), whose sum is σ = 18933441120. Its totient is φ = 8422110720.

The previous prime is 12706619371. The next prime is 12706619407. The reversal of 12706619391 is 19391660721.

12706619391 is a `hidden beast` number, since 1 + 27 + 0 + 6 + 619 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 12706619391 - 2⁶ = 12706619327 is a prime.

It is a super-2 number, since 2×12706619391² (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 (12706619371) 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, 1355490 + ... + 1364831.

It is an arithmetic number, because the mean of its divisors is an integer number (1183340070).

Almost surely, 2^12706619391 is an apocalyptic number.

12706619391 is a deficient number, since it is larger than the sum of its proper divisors (6226821729).

12706619391 is a wasteful number, since it uses less digits than its factorization.

12706619391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720503 (or 2720497 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 12706619391 in words is "twelve billion, seven hundred six million, six hundred nineteen thousand, three hundred ninety-one".