161535264 has 192 divisors, whose sum is σ = 497871360. Its totient is φ = 45342720.

The previous prime is 161535263. The next prime is 161535277. The reversal of 161535264 is 462535161.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (161535263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1665264 + ... + 1665360.

It is an arithmetic number, because the mean of its divisors is an integer number (2593080).

Almost surely, 2^161535264 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 161535264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248935680).

161535264 is an abundant number, since it is smaller than the sum of its proper divisors (336336096).

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

161535264 is a wasteful number, since it uses less digits than its factorization.

161535264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 215 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 161535264 is about 12709.6523949320. The cubic root of 161535264 is about 544.6143937892.

The spelling of 161535264 in words is "one hundred sixty-one million, five hundred thirty-five thousand, two hundred sixty-four".