168438594941 has 8 divisors (see below), whose sum is σ = 171703770840. Its totient is φ = 165176644672.

The previous prime is 168438594913. The next prime is 168438594991. The reversal of 168438594941 is 149495834861.

It can be written as a sum of positive squares in 4 ways, for example, as 30775334041 + 137663260900 = 175429^2 + 371030^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168438594941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168438594991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700826 + ... + 909963.

It is an arithmetic number, because the mean of its divisors is an integer number (21462971355).

Almost surely, 2^168438594941 is an apocalyptic number.

It is an amenable number.

168438594941 is a deficient number, since it is larger than the sum of its proper divisors (3265175899).

168438594941 is a wasteful number, since it uses less digits than its factorization.

168438594941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612815.

The product of its digits is 29859840, while the sum is 62.

The spelling of 168438594941 in words is "one hundred sixty-eight billion, four hundred thirty-eight million, five hundred ninety-four thousand, nine hundred forty-one".