161938895 has 8 divisors (see below), whose sum is σ = 195019920. Its totient is φ = 129088960.

The previous prime is 161938877. The next prime is 161938901. The reversal of 161938895 is 598839161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161938895 - 2¹⁴ = 161922511 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56225 + ... + 59034.

It is an arithmetic number, because the mean of its divisors is an integer number (24377490).

Almost surely, 2^161938895 is an apocalyptic number.

161938895 is a deficient number, since it is larger than the sum of its proper divisors (33081025).

161938895 is a wasteful number, since it uses less digits than its factorization.

161938895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115545.

The product of its digits is 466560, while the sum is 50.

The square root of 161938895 is about 12725.5214038561. The cubic root of 161938895 is about 545.0676290118.

The spelling of 161938895 in words is "one hundred sixty-one million, nine hundred thirty-eight thousand, eight hundred ninety-five".