163405494 has 36 divisors (see below), whose sum is σ = 411850764. Its totient is φ = 46687032.

The previous prime is 163405447. The next prime is 163405499. The reversal of 163405494 is 494504361.

163405494 is a `hidden beast` number, since 163 + 4 + 0 + 5 + 494 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163405499) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91752 + ... + 93515.

It is an arithmetic number, because the mean of its divisors is an integer number (11440299).

Almost surely, 2^163405494 is an apocalyptic number.

163405494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

163405494 is an abundant number, since it is smaller than the sum of its proper divisors (248445270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163405494 is a wasteful number, since it uses less digits than its factorization.

163405494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185289 (or 185279 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 163405494 is about 12783.0158413420. The cubic root of 163405494 is about 546.7081541156.

The spelling of 163405494 in words is "one hundred sixty-three million, four hundred five thousand, four hundred ninety-four".