16423220625 has 160 divisors (see below), whose sum is σ = 32335049472. Its totient is φ = 7257600000.

The previous prime is 16423220623. The next prime is 16423220689. The reversal of 16423220625 is 52602232461.

It is a happy number.

It is not a de Polignac number, because 16423220625 - 2¹ = 16423220623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16423220623) 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 159 ways as a sum of consecutive naturals, for example, 58445485 + ... + 58445765.

Almost surely, 2^16423220625 is an apocalyptic number.

16423220625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16423220625 is a deficient number, since it is larger than the sum of its proper divisors (15911828847).

16423220625 is an equidigital number, since it uses as much as digits as its factorization.

16423220625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 16423220625 in words is "sixteen billion, four hundred twenty-three million, two hundred twenty thousand, six hundred twenty-five".