16442066417225 has 12 divisors (see below), whose sum is σ = 20388218677260. Its totient is φ = 13153616798400.

The previous prime is 16442066417207. The next prime is 16442066417291. The reversal of 16442066417225 is 52271466024461.

It can be written as a sum of positive squares in 6 ways, for example, as 145109188624 + 16296957228601 = 380932^2 + 4036949^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16442066417225 is a prime.

It is a super-3 number, since 3×16442066417225³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11819711 + ... + 13137339.

It is an arithmetic number, because the mean of its divisors is an integer number (1699018223105).

Almost surely, 2^{16442066417225} is an apocalyptic number.

It is an amenable number.

16442066417225 is a deficient number, since it is larger than the sum of its proper divisors (3946152260035).

16442066417225 is a wasteful number, since it uses less digits than its factorization.

16442066417225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816780 (or 1816775 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 16442066417225 in words is "sixteen trillion, four hundred forty-two billion, sixty-six million, four hundred seventeen thousand, two hundred twenty-five".