163455813 has 20 divisors (see below), whose sum is σ = 247827360. Its totient is φ = 107340552.

The previous prime is 163455797. The next prime is 163455821. The reversal of 163455813 is 318554361.

163455813 is a `hidden beast` number, since 1 + 634 + 5 + 5 + 8 + 13 = 666.

163455813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163455813 - 2⁴ = 163455797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163455863) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9633 + ... + 20486.

It is an arithmetic number, because the mean of its divisors is an integer number (12391368).

Almost surely, 2^163455813 is an apocalyptic number.

It is an amenable number.

163455813 is a deficient number, since it is larger than the sum of its proper divisors (84371547).

163455813 is an equidigital number, since it uses as much as digits as its factorization.

163455813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30198 (or 30189 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 163455813 is about 12784.9838873579. The cubic root of 163455813 is about 546.7642660280.

The spelling of 163455813 in words is "one hundred sixty-three million, four hundred fifty-five thousand, eight hundred thirteen".