12115525450 has 24 divisors (see below), whose sum is σ = 25754146272. Its totient is φ = 4153894320.

The previous prime is 12115525423. The next prime is 12115525463. The reversal of 12115525450 is 5452551121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17307544 + ... + 17308243.

It is an arithmetic number, because the mean of its divisors is an integer number (1073089428).

Almost surely, 2^12115525450 is an apocalyptic number.

12115525450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12115525450 is an abundant number, since it is smaller than the sum of its proper divisors (13638620822).

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

12115525450 is a wasteful number, since it uses less digits than its factorization.

12115525450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34615806 (or 34615801 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 12115525450 in words is "twelve billion, one hundred fifteen million, five hundred twenty-five thousand, four hundred fifty".