16385505025 has 12 divisors (see below), whose sum is σ = 20319628032. Its totient is φ = 13107370640.

The previous prime is 16385505011. The next prime is 16385505047. The reversal of 16385505025 is 52050558361.

16385505025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-16385505025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 544524 + ... + 573826.

It is an arithmetic number, because the mean of its divisors is an integer number (1693302336).

Almost surely, 2^16385505025 is an apocalyptic number.

It is an amenable number.

16385505025 is a deficient number, since it is larger than the sum of its proper divisors (3934123007).

16385505025 is a wasteful number, since it uses less digits than its factorization.

16385505025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51680 (or 51675 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 16385505025 in words is "sixteen billion, three hundred eighty-five million, five hundred five thousand, twenty-five".