163425145649 has 4 divisors (see below), whose sum is σ = 165043216500. Its totient is φ = 161807074800.

The previous prime is 163425145643. The next prime is 163425145661. The reversal of 163425145649 is 946541524361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135324658225 + 28100487424 = 367865^2 + 167632^2 .

It is a cyclic number.

It is not a de Polignac number, because 163425145649 - 2⁸ = 163425145393 is a prime.

It is a super-3 number, since 3×163425145649³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163425145597 and 163425145606.

It is not an unprimeable number, because it can be changed into a prime (163425145643) 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, 809035274 + ... + 809035475.

It is an arithmetic number, because the mean of its divisors is an integer number (41260804125).

Almost surely, 2^163425145649 is an apocalyptic number.

It is an amenable number.

163425145649 is a deficient number, since it is larger than the sum of its proper divisors (1618070851).

163425145649 is a wasteful number, since it uses less digits than its factorization.

163425145649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618070850.

The product of its digits is 3110400, while the sum is 50.

The spelling of 163425145649 in words is "one hundred sixty-three billion, four hundred twenty-five million, one hundred forty-five thousand, six hundred forty-nine".