16463502225 has 18 divisors (see below), whose sum is σ = 29487962166. Its totient is φ = 8780534400.

The previous prime is 16463502221. The next prime is 16463502241. The reversal of 16463502225 is 52220536461.

16463502225 is a `hidden beast` number, since 1 + 646 + 3 + 5 + 0 + 2 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2166995601 + 14296506624 = 46551^2 + 119568^2 .

It is not a de Polignac number, because 16463502225 - 2² = 16463502221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16463502225.

It is not an unprimeable number, because it can be changed into a prime (16463502221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36585336 + ... + 36585785.

Almost surely, 2^16463502225 is an apocalyptic number.

16463502225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16463502225 is a deficient number, since it is larger than the sum of its proper divisors (13024459941).

16463502225 is a wasteful number, since it uses less digits than its factorization.

16463502225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73171137 (or 73171129 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 16463502225 in words is "sixteen billion, four hundred sixty-three million, five hundred two thousand, two hundred twenty-five".