3645571536 has 80 divisors (see below), whose sum is σ = 10593429120. Its totient is φ = 1215178848.

The previous prime is 3645571493. The next prime is 3645571541. The reversal of 3645571536 is 6351755463.

3645571536 is a `hidden beast` number, since 3 + 6 + 45 + 5 + 71 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 3645571491 and 3645571500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17100 + ... + 87083.

It is an arithmetic number, because the mean of its divisors is an integer number (132417864).

Almost surely, 2^3645571536 is an apocalyptic number.

3645571536 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3645571536 is an abundant number, since it is smaller than the sum of its proper divisors (6947857584).

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

3645571536 is an equidigital number, since it uses as much as digits as its factorization.

3645571536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104212 (or 104188 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 45.

The square root of 3645571536 is about 60378.5685156579. The cubic root of 3645571536 is about 1539.0587850737.

The spelling of 3645571536 in words is "three billion, six hundred forty-five million, five hundred seventy-one thousand, five hundred thirty-six".