16501263564 has 48 divisors (see below), whose sum is σ = 40838878080. Its totient is φ = 5171137920.

The previous prime is 16501263533. The next prime is 16501263577. The reversal of 16501263564 is 46536210561.

It is an unprimeable number.

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, 246369 + ... + 306104.

It is an arithmetic number, because the mean of its divisors is an integer number (850809960).

Almost surely, 2^16501263564 is an apocalyptic number.

It is an amenable number.

16501263564 is an abundant number, since it is smaller than the sum of its proper divisors (24337614516).

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

16501263564 is a wasteful number, since it uses less digits than its factorization.

16501263564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552630 (or 552628 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 16501263564 in words is "sixteen billion, five hundred one million, two hundred sixty-three thousand, five hundred sixty-four".