13025121805 has 16 divisors (see below), whose sum is σ = 15722035200. Its totient is φ = 10358909440.

The previous prime is 13025121773. The next prime is 13025121817. The reversal of 13025121805 is 50812152031.

It is not a de Polignac number, because 13025121805 - 2⁵ = 13025121773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1943901 + ... + 1950589.

It is an arithmetic number, because the mean of its divisors is an integer number (982627200).

Almost surely, 2^13025121805 is an apocalyptic number.

It is an amenable number.

13025121805 is a deficient number, since it is larger than the sum of its proper divisors (2696913395).

13025121805 is a wasteful number, since it uses less digits than its factorization.

13025121805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8924.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 13025121805 its reverse (50812152031), we get a palindrome (63837273836).

The spelling of 13025121805 in words is "thirteen billion, twenty-five million, one hundred twenty-one thousand, eight hundred five".