17120720000 has 80 divisors (see below), whose sum is σ = 42621161550. Its totient is φ = 6848256000.

The previous prime is 17120719999. The next prime is 17120720027. The reversal of 17120720000 is 2702171.

It can be written as a sum of positive squares in 5 ways, for example, as 310041664 + 16810678336 = 17608^2 + 129656^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27005 + ... + 187004.

Almost surely, 2^17120720000 is an apocalyptic number.

17120720000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17120720000 is an abundant number, since it is smaller than the sum of its proper divisors (25500441550).

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

17120720000 is an frugal number, since it uses more digits than its factorization.

17120720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214043 (or 214016 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The spelling of 17120720000 in words is "seventeen billion, one hundred twenty million, seven hundred twenty thousand".