12485972691 has 10 divisors (see below), whose sum is σ = 18651885252. Its totient is φ = 8323981740.

The previous prime is 12485972669. The next prime is 12485972699. The reversal of 12485972691 is 19627958421.

It is a happy number.

12485972691 is a `hidden beast` number, since 1 + 2 + 48 + 597 + 2 + 6 + 9 + 1 = 666.

12485972691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12485972691 - 2¹⁵ = 12485939923 is a prime.

It is a super-3 number, since 3×12485972691³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12485972699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77073825 + ... + 77073986.

Almost surely, 2^12485972691 is an apocalyptic number.

12485972691 is a deficient number, since it is larger than the sum of its proper divisors (6165912561).

12485972691 is an equidigital number, since it uses as much as digits as its factorization.

12485972691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154147823 (or 154147814 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 12485972691 in words is "twelve billion, four hundred eighty-five million, nine hundred seventy-two thousand, six hundred ninety-one".