163657764723 has 24 divisors (see below), whose sum is σ = 225658106064. Its totient is φ = 105500598720.

The previous prime is 163657764703. The next prime is 163657764731. The reversal of 163657764723 is 327467756361.

It is a happy number.

It is not a de Polignac number, because 163657764723 - 2⁹ = 163657764211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163657764703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3659365 + ... + 3703817.

It is an arithmetic number, because the mean of its divisors is an integer number (9402421086).

Almost surely, 2^163657764723 is an apocalyptic number.

163657764723 is a deficient number, since it is larger than the sum of its proper divisors (62000341341).

163657764723 is a wasteful number, since it uses less digits than its factorization.

163657764723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45795 (or 45764 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 57.

The spelling of 163657764723 in words is "one hundred sixty-three billion, six hundred fifty-seven million, seven hundred sixty-four thousand, seven hundred twenty-three".