12787439571125 has 8 divisors (see below), whose sum is σ = 15958724584920. Its totient is φ = 10229951656800.

The previous prime is 12787439571097. The next prime is 12787439571139. The reversal of 12787439571125 is 52117593478721.

It can be written as a sum of positive squares in 4 ways, for example, as 21446430916 + 12765993140209 = 146446^2 + 3572953^2 .

It is not a de Polignac number, because 12787439571125 - 2⁸ = 12787439570869 is a prime.

It is a super-2 number, since 2×12787439571125² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51149758160 + ... + 51149758409.

It is an arithmetic number, because the mean of its divisors is an integer number (1994840573115).

Almost surely, 2^{12787439571125} is an apocalyptic number.

It is an amenable number.

12787439571125 is a deficient number, since it is larger than the sum of its proper divisors (3171285013795).

12787439571125 is an equidigital number, since it uses as much as digits as its factorization.

12787439571125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102299516584 (or 102299516574 counting only the distinct ones).

The product of its digits is 29635200, while the sum is 62.

The spelling of 12787439571125 in words is "twelve trillion, seven hundred eighty-seven billion, four hundred thirty-nine million, five hundred seventy-one thousand, one hundred twenty-five".