1720545765540 has 96 divisors (see below), whose sum is σ = 5505920227584. Its totient is φ = 393255191040.

The previous prime is 1720545765539. The next prime is 1720545765551. The reversal of 1720545765540 is 455675450271.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23290342 + ... + 23364098.

It is an arithmetic number, because the mean of its divisors is an integer number (57353335704).

Almost surely, 2^{1720545765540} is an apocalyptic number.

1720545765540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720545765540 is an abundant number, since it is smaller than the sum of its proper divisors (3785374462044).

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

1720545765540 is a wasteful number, since it uses less digits than its factorization.

1720545765540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129317 (or 129315 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 1720545765540 in words is "one trillion, seven hundred twenty billion, five hundred forty-five million, seven hundred sixty-five thousand, five hundred forty".