12155271528 has 16 divisors (see below), whose sum is σ = 30388178880. Its totient is φ = 4051757168.

The previous prime is 12155271511. The next prime is 12155271529. The reversal of 12155271528 is 82517255121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12155271529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253234800 + ... + 253234847.

It is an arithmetic number, because the mean of its divisors is an integer number (1899261180).

Almost surely, 2^12155271528 is an apocalyptic number.

It is an amenable number.

12155271528 is an abundant number, since it is smaller than the sum of its proper divisors (18232907352).

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

12155271528 is a wasteful number, since it uses less digits than its factorization.

12155271528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506469656 (or 506469652 counting only the distinct ones).

The product of its digits is 56000, while the sum is 39.

The spelling of 12155271528 in words is "twelve billion, one hundred fifty-five million, two hundred seventy-one thousand, five hundred twenty-eight".