13191919367525 has 6 divisors (see below), whose sum is σ = 16357980015762. Its totient is φ = 10553535494000.

The previous prime is 13191919367509. The next prime is 13191919367531. The reversal of 13191919367525 is 52576391919131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2710629667201 + 10481289700324 = 1646399^2 + 3237482^2 .

It is not a de Polignac number, because 13191919367525 - 2⁴ = 13191919367509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263838387326 + ... + 263838387375.

It is an arithmetic number, because the mean of its divisors is an integer number (2726330002627).

Almost surely, 2^{13191919367525} is an apocalyptic number.

It is an amenable number.

13191919367525 is a deficient number, since it is larger than the sum of its proper divisors (3166060648237).

13191919367525 is an equidigital number, since it uses as much as digits as its factorization.

13191919367525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527676774711 (or 527676774706 counting only the distinct ones).

The product of its digits is 13778100, while the sum is 62.

The spelling of 13191919367525 in words is "thirteen trillion, one hundred ninety-one billion, nine hundred nineteen million, three hundred sixty-seven thousand, five hundred twenty-five".