12661545204 has 288 divisors, whose sum is σ = 42192783360. Its totient is φ = 3101587200.

The previous prime is 12661545179. The next prime is 12661545269. The reversal of 12661545204 is 40254516621.

12661545204 is a `hidden beast` number, since 1 + 26 + 61 + 54 + 520 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16379362 + ... + 16380134.

It is an arithmetic number, because the mean of its divisors is an integer number (146502720).

Almost surely, 2^12661545204 is an apocalyptic number.

12661545204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12661545204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21096391680).

12661545204 is an abundant number, since it is smaller than the sum of its proper divisors (29531238156).

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

12661545204 is a wasteful number, since it uses less digits than its factorization.

12661545204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 12661545204 in words is "twelve billion, six hundred sixty-one million, five hundred forty-five thousand, two hundred four".