16705664256 has 72 divisors (see below), whose sum is σ = 44480497824. Its totient is φ = 5566167040.

The previous prime is 16705664251. The next prime is 16705664309. The reversal of 16705664256 is 65246650761.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16705664251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3558871 + ... + 3563561.

It is an arithmetic number, because the mean of its divisors is an integer number (617784692).

Almost surely, 2^16705664256 is an apocalyptic number.

16705664256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16705664256 is an abundant number, since it is smaller than the sum of its proper divisors (27774833568).

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

16705664256 is an equidigital number, since it uses as much as digits as its factorization.

16705664256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347 (or 9333 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 16705664256 in words is "sixteen billion, seven hundred five million, six hundred sixty-four thousand, two hundred fifty-six".