12550420520 has 64 divisors (see below), whose sum is σ = 30888570240. Its totient is φ = 4551494400.

The previous prime is 12550420513. The next prime is 12550420559. The reversal of 12550420520 is 2502405521.

It is a self number, because there is not a number n which added to its sum of digits gives 12550420520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125885 + ... + 202355.

It is an arithmetic number, because the mean of its divisors is an integer number (482633910).

Almost surely, 2^12550420520 is an apocalyptic number.

12550420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12550420520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15444285120).

12550420520 is an abundant number, since it is smaller than the sum of its proper divisors (18338149720).

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

12550420520 is a wasteful number, since it uses less digits than its factorization.

12550420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76866 (or 76862 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 12550420520 in words is "twelve billion, five hundred fifty million, four hundred twenty thousand, five hundred twenty".