12238775641 has 3 divisors (see below), whose sum is σ = 12238886271. Its totient is φ = 12238665012.

The previous prime is 12238775629. The next prime is 12238775749. The reversal of 12238775641 is 14657783221.

The square root of 12238775641 is 110629.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1476788041 + 10761987600 = 38429^2 + 103740^2 .

It is not a de Polignac number, because 12238775641 - 2¹⁹ = 12238251353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12238775591 and 12238775600.

It is not an unprimeable number, because it can be changed into a prime (12238775611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55315 + ... + 165943.

It is an arithmetic number, because the mean of its divisors is an integer number (4079628757).

Almost surely, 2^12238775641 is an apocalyptic number.

12238775641 is the 110629-th square number.

12238775641 is the 55315-th centered octagonal number.

It is an amenable number.

12238775641 is a deficient number, since it is larger than the sum of its proper divisors (110630).

12238775641 is an frugal number, since it uses more digits than its factorization.

12238775641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221258 (or 110629 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The spelling of 12238775641 in words is "twelve billion, two hundred thirty-eight million, seven hundred seventy-five thousand, six hundred forty-one".