161388365 has 16 divisors (see below), whose sum is σ = 198519552. Its totient is φ = 125895744.

The previous prime is 161388349. The next prime is 161388379. The reversal of 161388365 is 563883161.

It is a cyclic number.

It is not a de Polignac number, because 161388365 - 2⁴ = 161388349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71027 + ... + 73263.

It is an arithmetic number, because the mean of its divisors is an integer number (12407472).

Almost surely, 2^161388365 is an apocalyptic number.

It is an amenable number.

161388365 is a deficient number, since it is larger than the sum of its proper divisors (37131187).

161388365 is a wasteful number, since it uses less digits than its factorization.

161388365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596.

The product of its digits is 103680, while the sum is 41.

The square root of 161388365 is about 12703.8720475294. The cubic root of 161388365 is about 544.4492542574.

The spelling of 161388365 in words is "one hundred sixty-one million, three hundred eighty-eight thousand, three hundred sixty-five".