16765581536 has 48 divisors (see below), whose sum is σ = 36024775920. Its totient is φ = 7617146880.

The previous prime is 16765581533. The next prime is 16765581583. The reversal of 16765581536 is 63518556761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16765581533) 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 7 ways as a sum of consecutive naturals, for example, 830960 + ... + 850896.

It is an arithmetic number, because the mean of its divisors is an integer number (750516165).

Almost surely, 2^16765581536 is an apocalyptic number.

16765581536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16765581536 is an abundant number, since it is smaller than the sum of its proper divisors (19259194384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16765581536 is a wasteful number, since it uses less digits than its factorization.

16765581536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22347 (or 22339 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 53.

The spelling of 16765581536 in words is "sixteen billion, seven hundred sixty-five million, five hundred eighty-one thousand, five hundred thirty-six".