161049704880 has 40 divisors (see below), whose sum is σ = 499254085872. Its totient is φ = 42946587904.

The previous prime is 161049704843. The next prime is 161049704891. The reversal of 161049704880 is 88407940161.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335519979 + ... + 335520458.

Almost surely, 2^161049704880 is an apocalyptic number.

161049704880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161049704880 is an abundant number, since it is smaller than the sum of its proper divisors (338204380992).

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

161049704880 is a wasteful number, since it uses less digits than its factorization.

161049704880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671040453 (or 671040447 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 161049704880 in words is "one hundred sixty-one billion, forty-nine million, seven hundred four thousand, eight hundred eighty".