168210253643 has 4 divisors (see below), whose sum is σ = 170339497440. Its totient is φ = 166081009848.

The previous prime is 168210253621. The next prime is 168210253661. The reversal of 168210253643 is 346352012861.

168210253643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 168210253643 - 2²² = 168206059339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168210253643.

It is not an unprimeable number, because it can be changed into a prime (168210253613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064621780 + ... + 1064621937.

It is an arithmetic number, because the mean of its divisors is an integer number (42584874360).

Almost surely, 2^168210253643 is an apocalyptic number.

168210253643 is a deficient number, since it is larger than the sum of its proper divisors (2129243797).

168210253643 is an equidigital number, since it uses as much as digits as its factorization.

168210253643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129243796.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 168210253643 in words is "one hundred sixty-eight billion, two hundred ten million, two hundred fifty-three thousand, six hundred forty-three".