163005643153646 has 4 divisors (see below), whose sum is σ = 244508464730472. Its totient is φ = 81502821576822.

The previous prime is 163005643153637. The next prime is 163005643153663. The reversal of 163005643153646 is 646351346500361.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40751410788410 + ... + 40751410788413.

It is an arithmetic number, because the mean of its divisors is an integer number (61127116182618).

Almost surely, 2^{163005643153646} is an apocalyptic number.

163005643153646 is a deficient number, since it is larger than the sum of its proper divisors (81502821576826).

163005643153646 is an equidigital number, since it uses as much as digits as its factorization.

163005643153646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81502821576825.

The product of its (nonzero) digits is 13996800, while the sum is 53.

The spelling of 163005643153646 in words is "one hundred sixty-three trillion, five billion, six hundred forty-three million, one hundred fifty-three thousand, six hundred forty-six".