161090712 has 96 divisors (see below), whose sum is σ = 460792800. Its totient is φ = 50738688.

The previous prime is 161090701. The next prime is 161090719. The reversal of 161090712 is 217090161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161090719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146838 + ... + 147930.

It is an arithmetic number, because the mean of its divisors is an integer number (4799925).

Almost surely, 2^161090712 is an apocalyptic number.

161090712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161090712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230396400).

161090712 is an abundant number, since it is smaller than the sum of its proper divisors (299702088).

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

161090712 is a wasteful number, since it uses less digits than its factorization.

161090712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 161090712 is about 12692.1515906485. The cubic root of 161090712 is about 544.1143340278.

The spelling of 161090712 in words is "one hundred sixty-one million, ninety thousand, seven hundred twelve".