161110620 has 120 divisors (see below), whose sum is σ = 551417328. Its totient is φ = 39052800.

The previous prime is 161110603. The next prime is 161110639. The reversal of 161110620 is 26011161.

161110620 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 (18).

It is a junction number, because it is equal to n+sod(n) for n = 161110593 and 161110602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13300 + ... + 22340.

Almost surely, 2^161110620 is an apocalyptic number.

161110620 is a gapful number since it is divisible by the number (10) 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 161110620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275708664).

161110620 is an abundant number, since it is smaller than the sum of its proper divisors (390306708).

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

161110620 is a wasteful number, since it uses less digits than its factorization.

161110620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073 (or 9062 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 161110620 is about 12692.9358306107. The cubic root of 161110620 is about 544.1367474491.

Adding to 161110620 its reverse (26011161), we get a palindrome (187121781).

The spelling of 161110620 in words is "one hundred sixty-one million, one hundred ten thousand, six hundred twenty".