16445624401 has 16 divisors (see below), whose sum is σ = 17414425600. Its totient is φ = 15487424208.

The previous prime is 16445624369. The next prime is 16445624551. The reversal of 16445624401 is 10442654461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16445624401 - 2⁵ = 16445624369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16445624801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2357020 + ... + 2363986.

It is an arithmetic number, because the mean of its divisors is an integer number (1088401600).

Almost surely, 2^16445624401 is an apocalyptic number.

It is an amenable number.

16445624401 is a deficient number, since it is larger than the sum of its proper divisors (968801199).

16445624401 is a wasteful number, since it uses less digits than its factorization.

16445624401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7708.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 16445624401 in words is "sixteen billion, four hundred forty-five million, six hundred twenty-four thousand, four hundred one".