161130870 has 168 divisors, whose sum is σ = 468870768. Its totient is φ = 39774240.

The previous prime is 161130859. The next prime is 161130889. The reversal of 161130870 is 78031161.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 5197755 + ... + 5197785.

Almost surely, 2^161130870 is an apocalyptic number.

161130870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161130870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234435384).

161130870 is an abundant number, since it is smaller than the sum of its proper divisors (307739898).

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

161130870 is an equidigital number, since it uses as much as digits as its factorization.

161130870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 161130870 is about 12693.7334933423. The cubic root of 161130870 is about 544.1595440169.

The spelling of 161130870 in words is "one hundred sixty-one million, one hundred thirty thousand, eight hundred seventy".