16144402525 has 6 divisors (see below), whose sum is σ = 20019059162. Its totient is φ = 12915522000.

The previous prime is 16144402501. The next prime is 16144402531. The reversal of 16144402525 is 52520444161.

It can be written as a sum of positive squares in 3 ways, for example, as 429774361 + 15714628164 = 20731^2 + 125358^2 .

It is not a de Polignac number, because 16144402525 - 2⁹ = 16144402013 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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322888026 + ... + 322888075.

Almost surely, 2^16144402525 is an apocalyptic number.

It is an amenable number.

16144402525 is a deficient number, since it is larger than the sum of its proper divisors (3874656637).

16144402525 is an equidigital number, since it uses as much as digits as its factorization.

16144402525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645776111 (or 645776106 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 16144402525 its reverse (52520444161), we get a palindrome (68664846686).

The spelling of 16144402525 in words is "sixteen billion, one hundred forty-four million, four hundred two thousand, five hundred twenty-five".