161465736 has 64 divisors (see below), whose sum is σ = 420840000. Its totient is φ = 51561216.

The previous prime is 161465723. The next prime is 161465737. The reversal of 161465736 is 637564161.

161465736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161465694 and 161465703.

It is not an unprimeable number, because it can be changed into a prime (161465737) 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, 95910 + ... + 97578.

It is an arithmetic number, because the mean of its divisors is an integer number (6575625).

Almost surely, 2^161465736 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 161465736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210420000).

161465736 is an abundant number, since it is smaller than the sum of its proper divisors (259374264).

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

161465736 is a wasteful number, since it uses less digits than its factorization.

161465736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1842 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 161465736 is about 12706.9168565785. The cubic root of 161465736 is about 544.5362449427.

The spelling of 161465736 in words is "one hundred sixty-one million, four hundred sixty-five thousand, seven hundred thirty-six".