161538862 has 12 divisors (see below), whose sum is σ = 257401080. Its totient is φ = 76018016.

The previous prime is 161538841. The next prime is 161538887. The reversal of 161538862 is 268835161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139162 + ... + 140317.

It is an arithmetic number, because the mean of its divisors is an integer number (21450090).

Almost surely, 2^161538862 is an apocalyptic number.

161538862 is a deficient number, since it is larger than the sum of its proper divisors (95862218).

161538862 is a wasteful number, since it uses less digits than its factorization.

161538862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279515 (or 279498 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 161538862 is about 12709.7939401078. The cubic root of 161538862 is about 544.6184372985.

The spelling of 161538862 in words is "one hundred sixty-one million, five hundred thirty-eight thousand, eight hundred sixty-two".