12505770844 has 24 divisors (see below), whose sum is σ = 25042052448. Its totient is φ = 5353078080.

The previous prime is 12505770829. The next prime is 12505770941. The reversal of 12505770844 is 44807750521.

It is a self number, because there is not a number n which added to its sum of digits gives 12505770844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249019 + ... + 294994.

It is an arithmetic number, because the mean of its divisors is an integer number (1043418852).

Almost surely, 2^12505770844 is an apocalyptic number.

12505770844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12505770844 is an abundant number, since it is smaller than the sum of its proper divisors (12536281604).

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

12505770844 is a wasteful number, since it uses less digits than its factorization.

12505770844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544845 (or 544843 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

The spelling of 12505770844 in words is "twelve billion, five hundred five million, seven hundred seventy thousand, eight hundred forty-four".