16505162565 has 16 divisors (see below), whose sum is σ = 26480226048. Its totient is φ = 8778764736.

The previous prime is 16505162539. The next prime is 16505162567. The reversal of 16505162565 is 56526150561.

It is not a de Polignac number, because 16505162565 - 2⁸ = 16505162309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505162567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1493602 + ... + 1504611.

It is an arithmetic number, because the mean of its divisors is an integer number (1655014128).

Almost surely, 2^16505162565 is an apocalyptic number.

16505162565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16505162565 is a deficient number, since it is larger than the sum of its proper divisors (9975063483).

16505162565 is a wasteful number, since it uses less digits than its factorization.

16505162565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998588.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 16505162565 in words is "sixteen billion, five hundred five million, one hundred sixty-two thousand, five hundred sixty-five".