12691723201687 has 8 divisors (see below), whose sum is σ = 12718203528672. Its totient is φ = 12665250998400.

The previous prime is 12691723201649. The next prime is 12691723201793. The reversal of 12691723201687 is 78610232719621.

12691723201687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12691723201687 - 2¹⁵ = 12691723168919 is a prime.

It is a super-2 number, since 2×12691723201687² (a number of 27 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 (12691723271687) 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, 1101987 + ... + 5157307.

It is an arithmetic number, because the mean of its divisors is an integer number (1589775441084).

Almost surely, 2^{12691723201687} is an apocalyptic number.

12691723201687 is a deficient number, since it is larger than the sum of its proper divisors (26480326985).

12691723201687 is an equidigital number, since it uses as much as digits as its factorization.

12691723201687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061849.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 12691723201687 in words is "twelve trillion, six hundred ninety-one billion, seven hundred twenty-three million, two hundred one thousand, six hundred eighty-seven".