12111638552 has 32 divisors (see below), whose sum is σ = 24470150880. Its totient is φ = 5586796800.

The previous prime is 12111638551. The next prime is 12111638557. The reversal of 12111638552 is 25583611121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111638551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154973 + ... + 219635.

It is an arithmetic number, because the mean of its divisors is an integer number (764692215).

Almost surely, 2^12111638552 is an apocalyptic number.

It is an amenable number.

12111638552 is an abundant number, since it is smaller than the sum of its proper divisors (12358512328).

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

12111638552 is a wasteful number, since it uses less digits than its factorization.

12111638552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66483 (or 66479 counting only the distinct ones).

The product of its digits is 14400, while the sum is 35.

The spelling of 12111638552 in words is "twelve billion, one hundred eleven million, six hundred thirty-eight thousand, five hundred fifty-two".