12685811670 has 96 divisors (see below), whose sum is σ = 37737722880. Its totient is φ = 2896326720.

The previous prime is 12685811659. The next prime is 12685811683. The reversal of 12685811670 is 7611858621.

12685811670 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 581 + 1 + 67 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 568015 + ... + 589925.

It is an arithmetic number, because the mean of its divisors is an integer number (393101280).

Almost surely, 2^12685811670 is an apocalyptic number.

12685811670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12685811670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18868861440).

12685811670 is an abundant number, since it is smaller than the sum of its proper divisors (25051911210).

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

12685811670 is a wasteful number, since it uses less digits than its factorization.

12685811670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22850 (or 22847 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 12685811670 in words is "twelve billion, six hundred eighty-five million, eight hundred eleven thousand, six hundred seventy".