16624089880225 has 9 divisors (see below), whose sum is σ = 20613896730553. Its totient is φ = 13299255595120.

The previous prime is 16624089880201. The next prime is 16624089880231. The reversal of 16624089880225 is 52208898042661.

The square root of 16624089880225 is 4077265.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4515527250529 + 12108562629696 = 2124977^2 + 3479736^2 .

It is not a de Polignac number, because 16624089880225 - 2¹⁵ = 16624089847457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19978599 + ... + 20794051.

Almost surely, 2^{16624089880225} is an apocalyptic number.

16624089880225 is the 4077265-th square number.

16624089880225 is the 2038633-rd centered octagonal number.

It is an amenable number.

16624089880225 is a deficient number, since it is larger than the sum of its proper divisors (3989806850328).

16624089880225 is an frugal number, since it uses more digits than its factorization.

16624089880225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630916 (or 815458 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 61.

The spelling of 16624089880225 in words is "sixteen trillion, six hundred twenty-four billion, eighty-nine million, eight hundred eighty thousand, two hundred twenty-five".