163644494 has 16 divisors (see below), whose sum is σ = 275843232. Its totient is φ = 72244128.

The previous prime is 163644463. The next prime is 163644539. The reversal of 163644494 is 494446361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136229 + ... + 137424.

It is an arithmetic number, because the mean of its divisors is an integer number (17240202).

Almost surely, 2^163644494 is an apocalyptic number.

163644494 is a deficient number, since it is larger than the sum of its proper divisors (112198738).

163644494 is a wasteful number, since it uses less digits than its factorization.

163644494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273691.

The product of its digits is 248832, while the sum is 41.

The square root of 163644494 is about 12792.3607672704. The cubic root of 163644494 is about 546.9745662045.

The spelling of 163644494 in words is "one hundred sixty-three million, six hundred forty-four thousand, four hundred ninety-four".