13225646423501 has 4 divisors (see below), whose sum is σ = 13292781684732. Its totient is φ = 13158511162272.

The previous prime is 13225646423491. The next prime is 13225646423503. The reversal of 13225646423501 is 10532464652231.

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 9425213142601 + 3800433280900 = 3070051^2 + 1949470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13225646423501 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 (13225646423503) 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, 33567630320 + ... + 33567630713.

It is an arithmetic number, because the mean of its divisors is an integer number (3323195421183).

Almost surely, 2^{13225646423501} is an apocalyptic number.

It is an amenable number.

13225646423501 is a deficient number, since it is larger than the sum of its proper divisors (67135261231).

13225646423501 is an equidigital number, since it uses as much as digits as its factorization.

13225646423501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67135261230.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 13225646423501 in words is "thirteen trillion, two hundred twenty-five billion, six hundred forty-six million, four hundred twenty-three thousand, five hundred one".