12525743993281 has 4 divisors (see below), whose sum is σ = 13262552463492. Its totient is φ = 11788935523072.

The previous prime is 12525743993221. The next prime is 12525743993297. The reversal of 12525743993281 is 18239934752521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10110778265025 + 2414965728256 = 3179745^2 + 1554016^2 .

It is a cyclic number.

It is not a de Polignac number, because 12525743993281 - 2⁷ = 12525743993153 is a prime.

It is a super-2 number, since 2×12525743993281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12525743993221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368404235080 + ... + 368404235113.

It is an arithmetic number, because the mean of its divisors is an integer number (3315638115873).

Almost surely, 2^{12525743993281} is an apocalyptic number.

It is an amenable number.

12525743993281 is a deficient number, since it is larger than the sum of its proper divisors (736808470211).

12525743993281 is an equidigital number, since it uses as much as digits as its factorization.

12525743993281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736808470210.

The product of its digits is 32659200, while the sum is 61.

The spelling of 12525743993281 in words is "twelve trillion, five hundred twenty-five billion, seven hundred forty-three million, nine hundred ninety-three thousand, two hundred eighty-one".