163616421 has 16 divisors (see below), whose sum is σ = 219935808. Its totient is φ = 108192000.

The previous prime is 163616393. The next prime is 163616423. The reversal of 163616421 is 124616361.

It is not a de Polignac number, because 163616421 - 2⁵ = 163616389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163616423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332986 + ... + 333476.

It is an arithmetic number, because the mean of its divisors is an integer number (13745988).

Almost surely, 2^163616421 is an apocalyptic number.

It is an amenable number.

163616421 is a deficient number, since it is larger than the sum of its proper divisors (56319387).

163616421 is a wasteful number, since it uses less digits than its factorization.

163616421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its digits is 5184, while the sum is 30.

The square root of 163616421 is about 12791.2634637865. The cubic root of 163616421 is about 546.9432868241.

The spelling of 163616421 in words is "one hundred sixty-three million, six hundred sixteen thousand, four hundred twenty-one".