3656984064 has 60 divisors (see below), whose sum is σ = 9748752156. Its totient is φ = 1218204672.

The previous prime is 3656984041. The next prime is 3656984069. The reversal of 3656984064 is 4604896563.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3656983998 and 3656984016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656984069) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2369277 + ... + 2370819.

Almost surely, 2^3656984064 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 3656984064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4874376078).

3656984064 is an abundant number, since it is smaller than the sum of its proper divisors (6091768092).

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

3656984064 is an frugal number, since it uses more digits than its factorization.

3656984064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The square root of 3656984064 is about 60473.0027698311. The cubic root of 3656984064 is about 1540.6631292668.

The spelling of 3656984064 in words is "three billion, six hundred fifty-six million, nine hundred eighty-four thousand, sixty-four".