16450642725 has 72 divisors (see below), whose sum is σ = 30532629120. Its totient is φ = 7806163200.

The previous prime is 16450642721. The next prime is 16450642777. The reversal of 16450642725 is 52724605461.

It is not a de Polignac number, because 16450642725 - 2² = 16450642721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16450642721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 407241 + ... + 445809.

Almost surely, 2^16450642725 is an apocalyptic number.

16450642725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16450642725 is a deficient number, since it is larger than the sum of its proper divisors (14081986395).

16450642725 is a wasteful number, since it uses less digits than its factorization.

16450642725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38651 (or 38635 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 16450642725 in words is "sixteen billion, four hundred fifty million, six hundred forty-two thousand, seven hundred twenty-five".