163388149369 has 3 divisors (see below), whose sum is σ = 163388553583. Its totient is φ = 163387745156.

The previous prime is 163388149357. The next prime is 163388149399. The reversal of 163388149369 is 963941883361.

The square root of 163388149369 is 404213.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 181845225 + 163206304144 = 13485^2 + 403988^2 .

It is not a de Polignac number, because 163388149369 - 2⁷ = 163388149241 is a prime.

It is a super-2 number, since 2×163388149369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163388149399) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 202107 + ... + 606319.

Almost surely, 2^163388149369 is an apocalyptic number.

163388149369 is the 404213-rd square number.

163388149369 is the 202107-th centered octagonal number.

It is an amenable number.

163388149369 is a deficient number, since it is larger than the sum of its proper divisors (404214).

163388149369 is an frugal number, since it uses more digits than its factorization.

163388149369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808426 (or 404213 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 61.

The spelling of 163388149369 in words is "one hundred sixty-three billion, three hundred eighty-eight million, one hundred forty-nine thousand, three hundred sixty-nine".