16505394960 has 40 divisors (see below), whose sum is σ = 51166725120. Its totient is φ = 4401438592.

The previous prime is 16505394947. The next prime is 16505394989. The reversal of 16505394960 is 6949350561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34386000 + ... + 34386479.

It is an arithmetic number, because the mean of its divisors is an integer number (1279168128).

Almost surely, 2^16505394960 is an apocalyptic number.

16505394960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505394960 is an abundant number, since it is smaller than the sum of its proper divisors (34661330160).

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

16505394960 is a wasteful number, since it uses less digits than its factorization.

16505394960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68772495 (or 68772489 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 16505394960 in words is "sixteen billion, five hundred five million, three hundred ninety-four thousand, nine hundred sixty".