5261256125545 has 16 divisors (see below), whose sum is σ = 7218371387520. Its totient is φ = 3606251278464.

The previous prime is 5261256125491. The next prime is 5261256125557. The reversal of 5261256125545 is 5455216521625.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5261256125545 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30479532 + ... + 30651661.

It is an arithmetic number, because the mean of its divisors is an integer number (451148211720).

Almost surely, 2^{5261256125545} is an apocalyptic number.

It is an amenable number.

5261256125545 is a deficient number, since it is larger than the sum of its proper divisors (1957115261975).

5261256125545 is a wasteful number, since it uses less digits than its factorization.

5261256125545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61133664.

The product of its digits is 3600000, while the sum is 49.

The spelling of 5261256125545 in words is "five trillion, two hundred sixty-one billion, two hundred fifty-six million, one hundred twenty-five thousand, five hundred forty-five".