6561425225603 has 4 divisors (see below), whose sum is σ = 6561717113448. Its totient is φ = 6561133337760.

The previous prime is 6561425225591. The next prime is 6561425225609. The reversal of 6561425225603 is 3065225241656.

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

It is a cyclic number.

It is not a de Polignac number, because 6561425225603 - 2¹⁴ = 6561425209219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6561425225609) 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, 145910201 + ... + 145955162.

It is an arithmetic number, because the mean of its divisors is an integer number (1640429278362).

Almost surely, 2^{6561425225603} is an apocalyptic number.

6561425225603 is a deficient number, since it is larger than the sum of its proper divisors (291887845).

6561425225603 is a wasteful number, since it uses less digits than its factorization.

6561425225603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291887844.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 6561425225603 in words is "six trillion, five hundred sixty-one billion, four hundred twenty-five million, two hundred twenty-five thousand, six hundred three".