12125166440 has 64 divisors (see below), whose sum is σ = 27497880000. Its totient is φ = 4811752960.

The previous prime is 12125166439. The next prime is 12125166461. The reversal of 12125166440 is 4466152121.

It is a super-2 number, since 2×12125166440² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12125166397 and 12125166406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3513836 + ... + 3517284.

It is an arithmetic number, because the mean of its divisors is an integer number (429654375).

Almost surely, 2^12125166440 is an apocalyptic number.

12125166440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12125166440 is an abundant number, since it is smaller than the sum of its proper divisors (15372713560).

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

12125166440 is a wasteful number, since it uses less digits than its factorization.

12125166440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 12125166440 in words is "twelve billion, one hundred twenty-five million, one hundred sixty-six thousand, four hundred forty".