12257521840 has 40 divisors (see below), whose sum is σ = 28723161600. Its totient is φ = 4864398336.

The previous prime is 12257521823. The next prime is 12257521879. The reversal of 12257521840 is 4812575221.

It is a happy number.

12257521840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 12257521840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593065 + ... + 613384.

It is an arithmetic number, because the mean of its divisors is an integer number (718079040).

Almost surely, 2^12257521840 is an apocalyptic number.

12257521840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12257521840 is an abundant number, since it is smaller than the sum of its proper divisors (16465639760).

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

12257521840 is a wasteful number, since it uses less digits than its factorization.

12257521840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206589 (or 1206583 counting only the distinct ones).

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

The spelling of 12257521840 in words is "twelve billion, two hundred fifty-seven million, five hundred twenty-one thousand, eight hundred forty".