2170685553445 has 4 divisors (see below), whose sum is σ = 2604822664140. Its totient is φ = 1736548442752.

The previous prime is 2170685553427. The next prime is 2170685553461. The reversal of 2170685553445 is 5443555860712.

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 1532094377284 + 638591176161 = 1237778^2 + 799119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170685553445 - 2⁹ = 2170685552933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217068555340 + ... + 217068555349.

It is an arithmetic number, because the mean of its divisors is an integer number (651205666035).

Almost surely, 2^{2170685553445} is an apocalyptic number.

It is an amenable number.

2170685553445 is a deficient number, since it is larger than the sum of its proper divisors (434137110695).

2170685553445 is an equidigital number, since it uses as much as digits as its factorization.

2170685553445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434137110694.

The product of its (nonzero) digits is 20160000, while the sum is 55.

The spelling of 2170685553445 in words is "two trillion, one hundred seventy billion, six hundred eighty-five million, five hundred fifty-three thousand, four hundred forty-five".