163398691325 has 24 divisors (see below), whose sum is σ = 216657014760. Its totient is φ = 121811456000.

The previous prime is 163398691319. The next prime is 163398691333. The reversal of 163398691325 is 523196893361.

It is a happy number.

163398691325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 793774276 + 162604917049 = 28174^2 + 403243^2 .

It is not a de Polignac number, because 163398691325 - 2¹² = 163398687229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1860380 + ... + 1946229.

It is an arithmetic number, because the mean of its divisors is an integer number (9027375615).

Almost surely, 2^163398691325 is an apocalyptic number.

It is an amenable number.

163398691325 is a deficient number, since it is larger than the sum of its proper divisors (53258323435).

163398691325 is a wasteful number, since it uses less digits than its factorization.

163398691325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806737 (or 3806732 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 56.

The spelling of 163398691325 in words is "one hundred sixty-three billion, three hundred ninety-eight million, six hundred ninety-one thousand, three hundred twenty-five".