161435036 has 48 divisors (see below), whose sum is σ = 335311872. Its totient is φ = 66571200.

The previous prime is 161435023. The next prime is 161435041. The reversal of 161435036 is 630534161.

It is a happy number.

It is a super-2 number, since 2×161435036² = 52122541696642592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79271 + ... + 81281.

It is an arithmetic number, because the mean of its divisors is an integer number (6985664).

Almost surely, 2^161435036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161435036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167655936).

161435036 is an abundant number, since it is smaller than the sum of its proper divisors (173876836).

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

161435036 is a wasteful number, since it uses less digits than its factorization.

161435036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130 (or 2128 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 161435036 is about 12705.7087956556. The cubic root of 161435036 is about 544.5017312790.

Adding to 161435036 its reverse (630534161), we get a palindrome (791969197).

The spelling of 161435036 in words is "one hundred sixty-one million, four hundred thirty-five thousand, thirty-six".