16444463625 has 48 divisors (see below), whose sum is σ = 30050117136. Its totient is φ = 8650195200.

The previous prime is 16444463603. The next prime is 16444463671. The reversal of 16444463625 is 52636444461.

16444463625 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 4 + 4 + 636 + 2 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2795448384 + 13649015241 = 52872^2 + 116829^2 .

It is not a de Polignac number, because 16444463625 - 2²⁴ = 16427686409 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17994 + ... + 182243.

It is an arithmetic number, because the mean of its divisors is an integer number (626044107).

Almost surely, 2^16444463625 is an apocalyptic number.

16444463625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16444463625 is a deficient number, since it is larger than the sum of its proper divisors (13605653511).

16444463625 is a wasteful number, since it uses less digits than its factorization.

16444463625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200331 (or 200318 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 16444463625 in words is "sixteen billion, four hundred forty-four million, four hundred sixty-three thousand, six hundred twenty-five".