12691338257016 has 48 divisors (see below), whose sum is σ = 34450671512400. Its totient is φ = 4220809523712.

The previous prime is 12691338257009. The next prime is 12691338257053. The reversal of 12691338257016 is 61075283319621.

It is a happy number.

12691338257016 is a `hidden beast` number, since 1 + 2 + 69 + 1 + 3 + 3 + 8 + 2 + 570 + 1 + 6 = 666.

It is a super-2 number, since 2×12691338257016² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200729881 + ... + 200793096.

It is an arithmetic number, because the mean of its divisors is an integer number (717722323175).

Almost surely, 2^{12691338257016} is an apocalyptic number.

It is an amenable number.

12691338257016 is an abundant number, since it is smaller than the sum of its proper divisors (21759333255384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12691338257016 is a wasteful number, since it uses less digits than its factorization.

12691338257016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401523428 (or 401523421 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 12691338257016 in words is "twelve trillion, six hundred ninety-one billion, three hundred thirty-eight million, two hundred fifty-seven thousand, sixteen".