16444225287 has 48 divisors (see below), whose sum is σ = 28285467392. Its totient is φ = 9351961920.

The previous prime is 16444225261. The next prime is 16444225313. The reversal of 16444225287 is 78252244461.

16444225287 is a `hidden beast` number, since 1 + 64 + 44 + 22 + 528 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (16444225261) and next prime (16444225313).

It is not a de Polignac number, because 16444225287 - 2⁶ = 16444225223 is a prime.

It is a super-2 number, since 2×16444225287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16444225387) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 336003 + ... + 381819.

Almost surely, 2^16444225287 is an apocalyptic number.

16444225287 is a deficient number, since it is larger than the sum of its proper divisors (11841242105).

16444225287 is an equidigital number, since it uses as much as digits as its factorization.

16444225287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46050 (or 46038 counting only the distinct ones).

The product of its digits is 860160, while the sum is 45.

The spelling of 16444225287 in words is "sixteen billion, four hundred forty-four million, two hundred twenty-five thousand, two hundred eighty-seven".