12685541022 has 144 divisors (see below), whose sum is σ = 34725346656. Its totient is φ = 3276028800.

The previous prime is 12685540997. The next prime is 12685541027. The reversal of 12685541022 is 22014558621.

12685541022 is a `hidden beast` number, since 12 + 6 + 85 + 541 + 0 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685541027) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2757228 + ... + 2761824.

Almost surely, 2^12685541022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12685541022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17362673328).

12685541022 is an abundant number, since it is smaller than the sum of its proper divisors (22039805634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12685541022 is a wasteful number, since it uses less digits than its factorization.

12685541022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815 (or 4801 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 12685541022 in words is "twelve billion, six hundred eighty-five million, five hundred forty-one thousand, twenty-two".