2505260105509 has 4 divisors (see below), whose sum is σ = 2863154406304. Its totient is φ = 2147365804716.

The previous prime is 2505260105501. The next prime is 2505260105531. The reversal of 2505260105509 is 9055010625052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2505260105509 - 2³ = 2505260105501 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 (2505260105501) 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, 178947150387 + ... + 178947150400.

It is an arithmetic number, because the mean of its divisors is an integer number (715788601576).

Almost surely, 2^{2505260105509} is an apocalyptic number.

It is an amenable number.

2505260105509 is a deficient number, since it is larger than the sum of its proper divisors (357894300795).

2505260105509 is an equidigital number, since it uses as much as digits as its factorization.

2505260105509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357894300794.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 2505260105509 in words is "two trillion, five hundred five billion, two hundred sixty million, one hundred five thousand, five hundred nine".