12541522780 has 24 divisors (see below), whose sum is σ = 26357652720. Its totient is φ = 5012712960.

The previous prime is 12541522711. The next prime is 12541522853. The reversal of 12541522780 is 8722514521.

It is a happy number.

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, 217045 + ... + 268684.

It is an arithmetic number, because the mean of its divisors is an integer number (1098235530).

Almost surely, 2^12541522780 is an apocalyptic number.

12541522780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12541522780 is an abundant number, since it is smaller than the sum of its proper divisors (13816129940).

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

12541522780 is a wasteful number, since it uses less digits than its factorization.

12541522780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487029 (or 487027 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 12541522780 in words is "twelve billion, five hundred forty-one million, five hundred twenty-two thousand, seven hundred eighty".