12109645850 has 12 divisors (see below), whose sum is σ = 22523941374. Its totient is φ = 4843858320.

The previous prime is 12109645837. The next prime is 12109645871. The reversal of 12109645850 is 5854690121.

It can be written as a sum of positive squares in 3 ways, for example, as 9668198929 + 2441446921 = 98327^2 + 49411^2 .

It is a super-2 number, since 2×12109645850² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12109645798 and 12109645807.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121096409 + ... + 121096508.

Almost surely, 2^12109645850 is an apocalyptic number.

12109645850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12109645850 is a deficient number, since it is larger than the sum of its proper divisors (10414295524).

12109645850 is a wasteful number, since it uses less digits than its factorization.

12109645850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242192929 (or 242192924 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 12109645850 in words is "twelve billion, one hundred nine million, six hundred forty-five thousand, eight hundred fifty".