12187776450 has 24 divisors (see below), whose sum is σ = 30225685968. Its totient is φ = 3250073680.

The previous prime is 12187776439. The next prime is 12187776529. The reversal of 12187776450 is 5467778121.

It is a super-3 number, since 3×12187776450³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12187776450.

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, 40625772 + ... + 40626071.

It is an arithmetic number, because the mean of its divisors is an integer number (1259403582).

Almost surely, 2^12187776450 is an apocalyptic number.

12187776450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12187776450 is an abundant number, since it is smaller than the sum of its proper divisors (18037909518).

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

12187776450 is a wasteful number, since it uses less digits than its factorization.

12187776450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81251858 (or 81251853 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 12187776450 in words is "twelve billion, one hundred eighty-seven million, seven hundred seventy-six thousand, four hundred fifty".