12691572446805 has 32 divisors (see below), whose sum is σ = 23701222232064. Its totient is φ = 5678417822016.

The previous prime is 12691572446779. The next prime is 12691572446827. The reversal of 12691572446805 is 50864427519621.

It is not a de Polignac number, because 12691572446805 - 2⁶ = 12691572446741 is a prime.

It is a super-2 number, since 2×12691572446805² (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 31 ways as a sum of consecutive naturals, for example, 1285868667 + ... + 1285878536.

It is an arithmetic number, because the mean of its divisors is an integer number (740663194752).

Almost surely, 2^{12691572446805} is an apocalyptic number.

12691572446805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12691572446805 is a deficient number, since it is larger than the sum of its proper divisors (11009649785259).

12691572446805 is a wasteful number, since it uses less digits than its factorization.

12691572446805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571747265.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 12691572446805 in words is "twelve trillion, six hundred ninety-one billion, five hundred seventy-two million, four hundred forty-six thousand, eight hundred five".