12511581280 has 48 divisors (see below), whose sum is σ = 32245761744. Its totient is φ = 4549665280.

The previous prime is 12511581259. The next prime is 12511581283. The reversal of 12511581280 is 8218511521.

It is a happy number.

It is a super-2 number, since 2×12511581280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511581283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552667 + ... + 3556186.

It is an arithmetic number, because the mean of its divisors is an integer number (671786703).

Almost surely, 2^12511581280 is an apocalyptic number.

12511581280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511581280 is an abundant number, since it is smaller than the sum of its proper divisors (19734180464).

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

12511581280 is a wasteful number, since it uses less digits than its factorization.

12511581280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108879 (or 7108871 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 34.

The spelling of 12511581280 in words is "twelve billion, five hundred eleven million, five hundred eighty-one thousand, two hundred eighty".