161346666828 has 24 divisors (see below), whose sum is σ = 388619929600. Its totient is φ = 52047311760.

The previous prime is 161346666823. The next prime is 161346666839. The reversal of 161346666828 is 828666643161.

It is not an unprimeable number, because it can be changed into a prime (161346666823) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 216863428 + ... + 216864171.

Almost surely, 2^161346666828 is an apocalyptic number.

It is an amenable number.

161346666828 is an abundant number, since it is smaller than the sum of its proper divisors (227273262772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161346666828 is a wasteful number, since it uses less digits than its factorization.

161346666828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433727637 (or 433727635 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 57.

The spelling of 161346666828 in words is "one hundred sixty-one billion, three hundred forty-six million, six hundred sixty-six thousand, eight hundred twenty-eight".