12155205048 has 128 divisors (see below), whose sum is σ = 37010718720. Its totient is φ = 3251191680.

The previous prime is 12155205043. The next prime is 12155205079. The reversal of 12155205048 is 84050255121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155205043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148143 + ... + 215073.

It is an arithmetic number, because the mean of its divisors is an integer number (289146240).

Almost surely, 2^12155205048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12155205048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18505359360).

12155205048 is an abundant number, since it is smaller than the sum of its proper divisors (24855513672).

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

12155205048 is a wasteful number, since it uses less digits than its factorization.

12155205048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67017 (or 67013 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

The spelling of 12155205048 in words is "twelve billion, one hundred fifty-five million, two hundred five thousand, forty-eight".