163305765 has 24 divisors (see below), whose sum is σ = 323501568. Its totient is φ = 74653920.

The previous prime is 163305763. The next prime is 163305797. The reversal of 163305765 is 567503361.

It is a happy number.

It is not a de Polignac number, because 163305765 - 2¹ = 163305763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163305763) 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, 258901 + ... + 259530.

It is an arithmetic number, because the mean of its divisors is an integer number (13479232).

Almost surely, 2^163305765 is an apocalyptic number.

163305765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163305765 is a deficient number, since it is larger than the sum of its proper divisors (160195803).

163305765 is a wasteful number, since it uses less digits than its factorization.

163305765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518449 (or 518446 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 163305765 is about 12779.1144059360. The cubic root of 163305765 is about 546.5969098892.

The spelling of 163305765 in words is "one hundred sixty-three million, three hundred five thousand, seven hundred sixty-five".