163475867773 has 4 divisors (see below), whose sum is σ = 163562410620. Its totient is φ = 163389324928.

The previous prime is 163475867749. The next prime is 163475867813. The reversal of 163475867773 is 377768574361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 377768574361 = 691 ⋅546698371.

It can be written as a sum of positive squares in 2 ways, for example, as 24349105764 + 139126762009 = 156042^2 + 372997^2 .

It is a cyclic number.

It is not a de Polignac number, because 163475867773 - 2¹³ = 163475859581 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 (163475867713) 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, 43268590 + ... + 43272367.

It is an arithmetic number, because the mean of its divisors is an integer number (40890602655).

Almost surely, 2^163475867773 is an apocalyptic number.

It is an amenable number.

163475867773 is a deficient number, since it is larger than the sum of its proper divisors (86542847).

163475867773 is an equidigital number, since it uses as much as digits as its factorization.

163475867773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86542846.

The product of its digits is 124467840, while the sum is 64.

The spelling of 163475867773 in words is "one hundred sixty-three billion, four hundred seventy-five million, eight hundred sixty-seven thousand, seven hundred seventy-three".