3640654136 has 128 divisors (see below), whose sum is σ = 8306688000. Its totient is φ = 1493614080.

The previous prime is 3640654117. The next prime is 3640654139. The reversal of 3640654136 is 6314560463.

It is a self number, because there is not a number n which added to its sum of digits gives 3640654136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640654139) 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, 10802960 + ... + 10803296.

It is an arithmetic number, because the mean of its divisors is an integer number (64896000).

Almost surely, 2^3640654136 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 3640654136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4153344000).

3640654136 is an abundant number, since it is smaller than the sum of its proper divisors (4666033864).

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

3640654136 is a wasteful number, since it uses less digits than its factorization.

3640654136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 3640654136 is about 60337.8333717743. The cubic root of 3640654136 is about 1538.3664772540.

The spelling of 3640654136 in words is "three billion, six hundred forty million, six hundred fifty-four thousand, one hundred thirty-six".