163646440641136 has 20 divisors (see below), whose sum is σ = 318097763698792. Its totient is φ = 81556695170496.

The previous prime is 163646440641113. The next prime is 163646440641149. The reversal of 163646440641136 is 631146044646361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16657816815 + ... + 16657826638.

Almost surely, 2^{163646440641136} is an apocalyptic number.

163646440641136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

163646440641136 is a deficient number, since it is larger than the sum of its proper divisors (154451323057656).

163646440641136 is a wasteful number, since it uses less digits than its factorization.

163646440641136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33315643768 (or 33315643762 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 55.

The spelling of 163646440641136 in words is "one hundred sixty-three trillion, six hundred forty-six billion, four hundred forty million, six hundred forty-one thousand, one hundred thirty-six".