12752625721 has 12 divisors (see below), whose sum is σ = 14156148132. Its totient is φ = 11478500000.

The previous prime is 12752625709. The next prime is 12752625763.

12752625721 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 7505796496 + 5246829225 = 86636^2 + 72435^2 .

It is not a de Polignac number, because 12752625721 - 2²⁹ = 12215754809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12752620721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509530 + ... + 533971.

It is an arithmetic number, because the mean of its divisors is an integer number (1179679011).

Almost surely, 2^12752625721 is an apocalyptic number.

12752625721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12752625721 is a deficient number, since it is larger than the sum of its proper divisors (1403522411).

12752625721 is a wasteful number, since it uses less digits than its factorization.

12752625721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043624 (or 1043613 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The spelling of 12752625721 in words is "twelve billion, seven hundred fifty-two million, six hundred twenty-five thousand, seven hundred twenty-one".