163735423647 has 4 divisors (see below), whose sum is σ = 218313898200. Its totient is φ = 109156949096.

The previous prime is 163735423637. The next prime is 163735423651. The reversal of 163735423647 is 746324537361.

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

It is a cyclic number.

It is not a de Polignac number, because 163735423647 - 2⁷ = 163735423519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163735423647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163735423627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27289237272 + ... + 27289237277.

It is an arithmetic number, because the mean of its divisors is an integer number (54578474550).

Almost surely, 2^163735423647 is an apocalyptic number.

163735423647 is a deficient number, since it is larger than the sum of its proper divisors (54578474553).

163735423647 is an equidigital number, since it uses as much as digits as its factorization.

163735423647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54578474552.

The product of its digits is 7620480, while the sum is 51.

The spelling of 163735423647 in words is "one hundred sixty-three billion, seven hundred thirty-five million, four hundred twenty-three thousand, six hundred forty-seven".