161109385828 has 24 divisors (see below), whose sum is σ = 282988539680. Its totient is φ = 80255620800.

The previous prime is 161109385799. The next prime is 161109385837. The reversal of 161109385828 is 828583901161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9249928 + ... + 9267328.

Almost surely, 2^161109385828 is an apocalyptic number.

It is an amenable number.

161109385828 is a deficient number, since it is larger than the sum of its proper divisors (121879153852).

161109385828 is a wasteful number, since it uses less digits than its factorization.

161109385828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25867 (or 25865 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 161109385828 in words is "one hundred sixty-one billion, one hundred nine million, three hundred eighty-five thousand, eight hundred twenty-eight".