12691449168145 has 16 divisors (see below), whose sum is σ = 16614402438528. Its totient is φ = 9230066122240.

The previous prime is 12691449168053. The next prime is 12691449168199. The reversal of 12691449168145 is 54186194419621.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12691449168145 is a prime.

It is a super-2 number, since 2×12691449168145² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5964897 + ... + 7807873.

It is an arithmetic number, because the mean of its divisors is an integer number (1038400152408).

Almost surely, 2^{12691449168145} is an apocalyptic number.

It is an amenable number.

12691449168145 is a deficient number, since it is larger than the sum of its proper divisors (3922953270383).

12691449168145 is a wasteful number, since it uses less digits than its factorization.

12691449168145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968200.

The product of its digits is 14929920, while the sum is 61.

The spelling of 12691449168145 in words is "twelve trillion, six hundred ninety-one billion, four hundred forty-nine million, one hundred sixty-eight thousand, one hundred forty-five".