161731828758 has 16 divisors (see below), whose sum is σ = 323476441776. Its totient is φ = 53908478880.

The previous prime is 161731828681. The next prime is 161731828793. The reversal of 161731828758 is 857828137161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161731828698 and 161731828707.

It is a congruent number.

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, 364113 + ... + 675308.

It is an arithmetic number, because the mean of its divisors is an integer number (20217277611).

Almost surely, 2^161731828758 is an apocalyptic number.

161731828758 is an abundant number, since it is smaller than the sum of its proper divisors (161744613018).

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

161731828758 is a wasteful number, since it uses less digits than its factorization.

161731828758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065359.

The product of its digits is 4515840, while the sum is 57.

The spelling of 161731828758 in words is "one hundred sixty-one billion, seven hundred thirty-one million, eight hundred twenty-eight thousand, seven hundred fifty-eight".