161789130 has 64 divisors (see below), whose sum is σ = 450213120. Its totient is φ = 41266368.

The previous prime is 161789129. The next prime is 161789149. The reversal of 161789130 is 31987161.

161789130 is a `hidden beast` number, since 1 + 617 + 8 + 9 + 1 + 30 = 666.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 6817 + ... + 19236.

It is an arithmetic number, because the mean of its divisors is an integer number (7034580).

Almost surely, 2^161789130 is an apocalyptic number.

161789130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161789130 is an abundant number, since it is smaller than the sum of its proper divisors (288423990).

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

161789130 is a wasteful number, since it uses less digits than its factorization.

161789130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26092 (or 26086 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 161789130 is about 12719.6356079881. The cubic root of 161789130 is about 544.8995466178.

The spelling of 161789130 in words is "one hundred sixty-one million, seven hundred eighty-nine thousand, one hundred thirty".