12696509199455 has 16 divisors (see below), whose sum is σ = 15266545398720. Its totient is φ = 10136718966528.

The previous prime is 12696509199431. The next prime is 12696509199469. The reversal of 12696509199455 is 55499190569621.

It is a cyclic number.

It is not a de Polignac number, because 12696509199455 - 2³⁴ = 12679329330271 is a prime.

It is a super-2 number, since 2×12696509199455² (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 15 ways as a sum of consecutive naturals, for example, 137557061 + ... + 137649329.

It is an arithmetic number, because the mean of its divisors is an integer number (954159087420).

Almost surely, 2^{12696509199455} is an apocalyptic number.

12696509199455 is a deficient number, since it is larger than the sum of its proper divisors (2570036199265).

12696509199455 is an equidigital number, since it uses as much as digits as its factorization.

12696509199455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147490.

The product of its (nonzero) digits is 236196000, while the sum is 71.

The spelling of 12696509199455 in words is "twelve trillion, six hundred ninety-six billion, five hundred nine million, one hundred ninety-nine thousand, four hundred fifty-five".