12501215520 has 48 divisors (see below), whose sum is σ = 39378830400. Its totient is φ = 3333657344.

The previous prime is 12501215491. The next prime is 12501215521. The reversal of 12501215520 is 2551210521.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (12501215521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13021620 + ... + 13022579.

It is an arithmetic number, because the mean of its divisors is an integer number (820392300).

Almost surely, 2^12501215520 is an apocalyptic number.

12501215520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12501215520 is an abundant number, since it is smaller than the sum of its proper divisors (26877614880).

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

12501215520 is a wasteful number, since it uses less digits than its factorization.

12501215520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26044217 (or 26044209 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 12501215520 in words is "twelve billion, five hundred one million, two hundred fifteen thousand, five hundred twenty".