2505868725905 has 4 divisors (see below), whose sum is σ = 3007042471092. Its totient is φ = 2004694980720.

The previous prime is 2505868725881. The next prime is 2505868725931. The reversal of 2505868725905 is 5095278685052.

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 1588194775696 + 917673950209 = 1260236^2 + 957953^2 .

It is not a de Polignac number, because 2505868725905 - 2⁸ = 2505868725649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250586872586 + ... + 250586872595.

It is an arithmetic number, because the mean of its divisors is an integer number (751760617773).

Almost surely, 2^{2505868725905} is an apocalyptic number.

It is an amenable number.

2505868725905 is a deficient number, since it is larger than the sum of its proper divisors (501173745187).

2505868725905 is an equidigital number, since it uses as much as digits as its factorization.

2505868725905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501173745186.

The product of its (nonzero) digits is 60480000, while the sum is 62.

The spelling of 2505868725905 in words is "two trillion, five hundred five billion, eight hundred sixty-eight million, seven hundred twenty-five thousand, nine hundred five".