168072801813 has 24 divisors (see below), whose sum is σ = 282001938816. Its totient is φ = 94467146400.

The previous prime is 168072801791. The next prime is 168072801839. The reversal of 168072801813 is 318108270861.

It is a happy number.

It is not a de Polignac number, because 168072801813 - 2⁹ = 168072801301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168072801313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21863553 + ... + 21871238.

It is an arithmetic number, because the mean of its divisors is an integer number (11750080784).

Almost surely, 2^168072801813 is an apocalyptic number.

It is an amenable number.

168072801813 is a deficient number, since it is larger than the sum of its proper divisors (113929137003).

168072801813 is a wasteful number, since it uses less digits than its factorization.

168072801813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43734865 (or 43734862 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 168072801813 in words is "one hundred sixty-eight billion, seventy-two million, eight hundred one thousand, eight hundred thirteen".