12669071850 has 72 divisors (see below), whose sum is σ = 34058763180. Its totient is φ = 3376316160.

The previous prime is 12669071837. The next prime is 12669071861. The reversal of 12669071850 is 5817096621.

It can be written as a sum of positive squares in 6 ways, for example, as 10633528161 + 2035543689 = 103119^2 + 45117^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12669071796 and 12669071805.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 797182 + ... + 812918.

Almost surely, 2^12669071850 is an apocalyptic number.

12669071850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12669071850 is an abundant number, since it is smaller than the sum of its proper divisors (21389691330).

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

12669071850 is a wasteful number, since it uses less digits than its factorization.

12669071850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17544 (or 17536 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 12669071850 in words is "twelve billion, six hundred sixty-nine million, seventy-one thousand, eight hundred fifty".