16231503555425 has 6 divisors (see below), whose sum is σ = 20127064408758. Its totient is φ = 12985202844320.

The previous prime is 16231503555391. The next prime is 16231503555439. The reversal of 16231503555425 is 52455530513261.

It can be written as a sum of positive squares in 3 ways, for example, as 1750731215104 + 14480772340321 = 1323152^2 + 3805361^2 .

It is not a de Polignac number, because 16231503555425 - 2¹⁰ = 16231503554401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16231503555425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324630071084 + ... + 324630071133.

It is an arithmetic number, because the mean of its divisors is an integer number (3354510734793).

Almost surely, 2^{16231503555425} is an apocalyptic number.

It is an amenable number.

16231503555425 is a deficient number, since it is larger than the sum of its proper divisors (3895560853333).

16231503555425 is an equidigital number, since it uses as much as digits as its factorization.

16231503555425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649260142227 (or 649260142222 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 47.

The spelling of 16231503555425 in words is "sixteen trillion, two hundred thirty-one billion, five hundred three million, five hundred fifty-five thousand, four hundred twenty-five".