2173021493617 has 4 divisors (see below), whose sum is σ = 2340176993140. Its totient is φ = 2005865994096.

The previous prime is 2173021493611. The next prime is 2173021493627. The reversal of 2173021493617 is 7163941203712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 528923107441 + 1644098386176 = 727271^2 + 1282224^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173021493617 - 2³ = 2173021493609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173021493611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83577749742 + ... + 83577749767.

It is an arithmetic number, because the mean of its divisors is an integer number (585044248285).

Almost surely, 2^{2173021493617} is an apocalyptic number.

It is an amenable number.

2173021493617 is a deficient number, since it is larger than the sum of its proper divisors (167155499523).

2173021493617 is a wasteful number, since it uses less digits than its factorization.

2173021493617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167155499522.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 2173021493617 in words is "two trillion, one hundred seventy-three billion, twenty-one million, four hundred ninety-three thousand, six hundred seventeen".