163425988 has 54 divisors (see below), whose sum is σ = 323073758. Its totient is φ = 72272640.

The previous prime is 163425961. The next prime is 163426001. The reversal of 163425988 is 889524361.

It can be written as a sum of positive squares in only one way, i.e., 136469124 + 26956864 = 11682^2 + 5192^2 .

It is a super-2 number, since 2×163425988² = 53416107107552288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1684756 + ... + 1684852.

Almost surely, 2^163425988 is an apocalyptic number.

It is an amenable number.

163425988 is a deficient number, since it is larger than the sum of its proper divisors (159647770).

163425988 is a wasteful number, since it uses less digits than its factorization.

163425988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 169 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 163425988 is about 12783.8174267313. The cubic root of 163425988 is about 546.7310088521.

The spelling of 163425988 in words is "one hundred sixty-three million, four hundred twenty-five thousand, nine hundred eighty-eight".