12461261641 has 4 divisors (see below), whose sum is σ = 12466419732. Its totient is φ = 12456103552.

The previous prime is 12461261639. The next prime is 12461261653. The reversal of 12461261641 is 14616216421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14616216421 = 98129 ⋅148949.

It can be written as a sum of positive squares in 2 ways, for example, as 12225946041 + 235315600 = 110571^2 + 15340^2 .

It is a cyclic number.

It is not a de Polignac number, because 12461261641 - 2¹ = 12461261639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12461261597 and 12461261606.

It is not an unprimeable number, because it can be changed into a prime (12461261621) 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, 2575420 + ... + 2580253.

It is an arithmetic number, because the mean of its divisors is an integer number (3116604933).

Almost surely, 2^12461261641 is an apocalyptic number.

It is an amenable number.

12461261641 is a deficient number, since it is larger than the sum of its proper divisors (5158091).

12461261641 is an equidigital number, since it uses as much as digits as its factorization.

12461261641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158090.

The product of its digits is 13824, while the sum is 34.

The spelling of 12461261641 in words is "twelve billion, four hundred sixty-one million, two hundred sixty-one thousand, six hundred forty-one".