12155719200 has 72 divisors (see below), whose sum is σ = 39566873808. Its totient is φ = 3241524480.

The previous prime is 12155719189. The next prime is 12155719207. The reversal of 12155719200 is 291755121.

It is not an unprimeable number, because it can be changed into a prime (12155719207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2530042 + ... + 2534841.

It is an arithmetic number, because the mean of its divisors is an integer number (549539914).

Almost surely, 2^12155719200 is an apocalyptic number.

12155719200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155719200 is an abundant number, since it is smaller than the sum of its proper divisors (27411154608).

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

12155719200 is a wasteful number, since it uses less digits than its factorization.

12155719200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064906 (or 5064893 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 33.

The spelling of 12155719200 in words is "twelve billion, one hundred fifty-five million, seven hundred nineteen thousand, two hundred".