168632620801 has 4 divisors (see below), whose sum is σ = 168692914132. Its totient is φ = 168572327472.

The previous prime is 168632620787. The next prime is 168632620813. The reversal of 168632620801 is 108026236861.

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 124626650625 + 44005970176 = 353025^2 + 209776^2 .

It is a cyclic number.

It is not a de Polignac number, because 168632620801 - 2²³ = 168624232193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168632620831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30142470 + ... + 30148063.

It is an arithmetic number, because the mean of its divisors is an integer number (42173228533).

Almost surely, 2^168632620801 is an apocalyptic number.

It is an amenable number.

168632620801 is a deficient number, since it is larger than the sum of its proper divisors (60293331).

168632620801 is an equidigital number, since it uses as much as digits as its factorization.

168632620801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60293330.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 168632620801 in words is "one hundred sixty-eight billion, six hundred thirty-two million, six hundred twenty thousand, eight hundred one".