12915251550 has 60 divisors (see below), whose sum is σ = 35885276856. Its totient is φ = 3444066000.

The previous prime is 12915251491. The next prime is 12915251551. The reversal of 12915251550 is 5515251921.

It is a happy number.

12915251550 is a `hidden beast` number, since 1 + 2 + 9 + 1 + 52 + 51 + 550 = 666.

12915251550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915251551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1590426 + ... + 1598525.

Almost surely, 2^12915251550 is an apocalyptic number.

12915251550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12915251550 is an abundant number, since it is smaller than the sum of its proper divisors (22970025306).

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

12915251550 is a wasteful number, since it uses less digits than its factorization.

12915251550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188975 (or 3188961 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 12915251550 in words is "twelve billion, nine hundred fifteen million, two hundred fifty-one thousand, five hundred fifty".