12501279127765 has 4 divisors (see below), whose sum is σ = 15001534953324. Its totient is φ = 10001023302208.

The previous prime is 12501279127763. The next prime is 12501279127793. The reversal of 12501279127765 is 56772197210521.

It is a happy number.

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 9293175437841 + 3208103689924 = 3048471^2 + 1791118^2 .

It is a cyclic number.

It is not a de Polignac number, because 12501279127765 - 2¹ = 12501279127763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12501279127763) 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, 1250127912772 + ... + 1250127912781.

It is an arithmetic number, because the mean of its divisors is an integer number (3750383738331).

Almost surely, 2^{12501279127765} is an apocalyptic number.

It is an amenable number.

12501279127765 is a deficient number, since it is larger than the sum of its proper divisors (2500255825559).

12501279127765 is an equidigital number, since it uses as much as digits as its factorization.

12501279127765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500255825558.

The product of its (nonzero) digits is 3704400, while the sum is 55.

The spelling of 12501279127765 in words is "twelve trillion, five hundred one billion, two hundred seventy-nine million, one hundred twenty-seven thousand, seven hundred sixty-five".