12509901980 has 12 divisors (see below), whose sum is σ = 26270794200. Its totient is φ = 5003960784.

The previous prime is 12509901889. The next prime is 12509901991. The reversal of 12509901980 is 8910990521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312747530 + ... + 312747569.

It is an arithmetic number, because the mean of its divisors is an integer number (2189232850).

Almost surely, 2^12509901980 is an apocalyptic number.

12509901980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12509901980 is an abundant number, since it is smaller than the sum of its proper divisors (13760892220).

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

12509901980 is a wasteful number, since it uses less digits than its factorization.

12509901980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625495108 (or 625495106 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 44.

The spelling of 12509901980 in words is "twelve billion, five hundred nine million, nine hundred one thousand, nine hundred eighty".