3644688156 has 48 divisors (see below), whose sum is σ = 8638576128. Its totient is φ = 1195768000.

The previous prime is 3644688149. The next prime is 3644688161. The reversal of 3644688156 is 6518864463.

It is a junction number, because it is equal to n+sod(n) for n = 3644688099 and 3644688108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553081 + ... + 559631.

It is an arithmetic number, because the mean of its divisors is an integer number (179970336).

Almost surely, 2^3644688156 is an apocalyptic number.

It is an amenable number.

3644688156 is an abundant number, since it is smaller than the sum of its proper divisors (4993887972).

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

3644688156 is a wasteful number, since it uses less digits than its factorization.

3644688156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282 (or 7280 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The square root of 3644688156 is about 60371.2527284303. The cubic root of 3644688156 is about 1538.9344622192.

The spelling of 3644688156 in words is "three billion, six hundred forty-four million, six hundred eighty-eight thousand, one hundred fifty-six".