12661533112 has 16 divisors (see below), whose sum is σ = 24506193600. Its totient is φ = 6126548160.

The previous prime is 12661533083. The next prime is 12661533127. The reversal of 12661533112 is 21133516621.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25527037 + ... + 25527532.

It is an arithmetic number, because the mean of its divisors is an integer number (1531637100).

Almost surely, 2^12661533112 is an apocalyptic number.

It is an amenable number.

12661533112 is a deficient number, since it is larger than the sum of its proper divisors (11844660488).

12661533112 is a wasteful number, since it uses less digits than its factorization.

12661533112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51054606 (or 51054602 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The spelling of 12661533112 in words is "twelve billion, six hundred sixty-one million, five hundred thirty-three thousand, one hundred twelve".