16442615664425 has 24 divisors (see below), whose sum is σ = 20617434721152. Its totient is φ = 13007068776000.

The previous prime is 16442615664407. The next prime is 16442615664469. The reversal of 16442615664425 is 52446651624461.

It is not a de Polignac number, because 16442615664425 - 2¹⁰ = 16442615663401 is a prime.

It is a super-3 number, since 3×16442615664425³ (a number of 41 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4233761 + ... + 7128110.

It is an arithmetic number, because the mean of its divisors is an integer number (859059780048).

Almost surely, 2^{16442615664425} is an apocalyptic number.

It is an amenable number.

16442615664425 is a deficient number, since it is larger than the sum of its proper divisors (4174819056727).

16442615664425 is a wasteful number, since it uses less digits than its factorization.

16442615664425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362529 (or 11362524 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 56.

The spelling of 16442615664425 in words is "sixteen trillion, four hundred forty-two billion, six hundred fifteen million, six hundred sixty-four thousand, four hundred twenty-five".