12266252640 has 72 divisors (see below), whose sum is σ = 41858592048. Its totient is φ = 3271000320.

The previous prime is 12266252549. The next prime is 12266252671. The reversal of 12266252640 is 4625266221.

12266252640 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 6 + 2 + 5 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12266252595 and 12266252604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4257676 + ... + 4260555.

It is an arithmetic number, because the mean of its divisors is an integer number (581369334).

Almost surely, 2^12266252640 is an apocalyptic number.

12266252640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12266252640 is an abundant number, since it is smaller than the sum of its proper divisors (29592339408).

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

12266252640 is a wasteful number, since it uses less digits than its factorization.

12266252640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518252 (or 8518241 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 12266252640 in words is "twelve billion, two hundred sixty-six million, two hundred fifty-two thousand, six hundred forty".