161061588 has 48 divisors (see below), whose sum is σ = 419784960. Its totient is φ = 53402112.

The previous prime is 161061581. The next prime is 161061599. The reversal of 161061588 is 885160161.

161061588 is a `hidden beast` number, since 1 + 6 + 10 + 61 + 588 = 666.

161061588 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161061581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16981 + ... + 24707.

It is an arithmetic number, because the mean of its divisors is an integer number (8745520).

Almost surely, 2^161061588 is an apocalyptic number.

161061588 is a gapful number since it is divisible by the number (18) 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 161061588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209892480).

161061588 is an abundant number, since it is smaller than the sum of its proper divisors (258723372).

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

161061588 is a wasteful number, since it uses less digits than its factorization.

161061588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933 (or 7925 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 161061588 is about 12691.0042155851. The cubic root of 161061588 is about 544.0815414462.

The spelling of 161061588 in words is "one hundred sixty-one million, sixty-one thousand, five hundred eighty-eight".