163721354113 has 8 divisors (see below), whose sum is σ = 173797664040. Its totient is φ = 153694560000.

The previous prime is 163721354101. The next prime is 163721354123. The reversal of 163721354113 is 311453127361.

It can be written as a sum of positive squares in 4 ways, for example, as 72569894544 + 91151459569 = 269388^2 + 301913^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 163721354113 - 2⁵ = 163721354081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163721354123) 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, 12372138 + ... + 12385363.

It is an arithmetic number, because the mean of its divisors is an integer number (21724708005).

Almost surely, 2^163721354113 is an apocalyptic number.

It is an amenable number.

163721354113 is a deficient number, since it is larger than the sum of its proper divisors (10076309927).

163721354113 is a wasteful number, since it uses less digits than its factorization.

163721354113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24757907.

The product of its digits is 45360, while the sum is 37.

The spelling of 163721354113 in words is "one hundred sixty-three billion, seven hundred twenty-one million, three hundred fifty-four thousand, one hundred thirteen".