12551045055450 has 96 divisors (see below), whose sum is σ = 33973176148992. Its totient is φ = 3041163768000.

The previous prime is 12551045055379. The next prime is 12551045055463. The reversal of 12551045055450 is 5455054015521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1426879 + ... + 5209421.

It is an arithmetic number, because the mean of its divisors is an integer number (353887251552).

Almost surely, 2^{12551045055450} is an apocalyptic number.

12551045055450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12551045055450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16986588074496).

12551045055450 is an abundant number, since it is smaller than the sum of its proper divisors (21422131093542).

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

12551045055450 is a wasteful number, since it uses less digits than its factorization.

12551045055450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784580 (or 3784575 counting only the distinct ones).

The product of its (nonzero) digits is 500000, while the sum is 42.

The spelling of 12551045055450 in words is "twelve trillion, five hundred fifty-one billion, forty-five million, fifty-five thousand, four hundred fifty".