1605135532 has 72 divisors (see below), whose sum is σ = 3838922640. Its totient is φ = 577261440.

The previous prime is 1605135503. The next prime is 1605135547. The reversal of 1605135532 is 2355315061.

It is a junction number, because it is equal to n+sod(n) for n = 1605135494 and 1605135503.

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, 607 + ... + 56662.

It is an arithmetic number, because the mean of its divisors is an integer number (53318370).

Almost surely, 2^1605135532 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 1605135532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1919461320).

1605135532 is an abundant number, since it is smaller than the sum of its proper divisors (2233787108).

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

1605135532 is a wasteful number, since it uses less digits than its factorization.

1605135532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57311 (or 57302 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 1605135532 is about 40064.1427213912. The cubic root of 1605135532 is about 1170.8571243836.

The spelling of 1605135532 in words is "one billion, six hundred five million, one hundred thirty-five thousand, five hundred thirty-two".