1720145102555 has 8 divisors (see below), whose sum is σ = 2251826316144. Its totient is φ = 1251014620000.

The previous prime is 1720145102539. The next prime is 1720145102563. The reversal of 1720145102555 is 5552015410271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1720145102555 - 2⁴ = 1720145102539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15637682696 + ... + 15637682805.

It is an arithmetic number, because the mean of its divisors is an integer number (281478289518).

Almost surely, 2^{1720145102555} is an apocalyptic number.

1720145102555 is a deficient number, since it is larger than the sum of its proper divisors (531681213589).

1720145102555 is a wasteful number, since it uses less digits than its factorization.

1720145102555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31275365517.

The product of its (nonzero) digits is 70000, while the sum is 38.

The spelling of 1720145102555 in words is "one trillion, seven hundred twenty billion, one hundred forty-five million, one hundred two thousand, five hundred fifty-five".