161437536 has 144 divisors (see below), whose sum is σ = 513034704. Its totient is φ = 49641984.

The previous prime is 161437517. The next prime is 161437543. The reversal of 161437536 is 635734161.

161437536 is a `hidden beast` number, since 1 + 614 + 3 + 7 + 5 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a self number, because there is not a number n which added to its sum of digits gives 161437536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100290 + ... + 101886.

It is an arithmetic number, because the mean of its divisors is an integer number (3562741).

Almost surely, 2^161437536 is an apocalyptic number.

161437536 is a gapful number since it is divisible by the number (16) 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 161437536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256517352).

161437536 is an abundant number, since it is smaller than the sum of its proper divisors (351597168).

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

161437536 is a wasteful number, since it uses less digits than its factorization.

161437536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1615 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 161437536 is about 12705.8071762482. The cubic root of 161437536 is about 544.5045420016.

The spelling of 161437536 in words is "one hundred sixty-one million, four hundred thirty-seven thousand, five hundred thirty-six".