3654649856 has 96 divisors (see below), whose sum is σ = 8585740800. Its totient is φ = 1533296640.

The previous prime is 3654649807. The next prime is 3654649907. The reversal of 3654649856 is 6589464563.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286625 + ... + 299103.

It is an arithmetic number, because the mean of its divisors is an integer number (89434800).

Almost surely, 2^3654649856 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 3654649856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4292870400).

3654649856 is an abundant number, since it is smaller than the sum of its proper divisors (4931090944).

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

3654649856 is a wasteful number, since it uses less digits than its factorization.

3654649856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525 (or 12505 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 56.

The square root of 3654649856 is about 60453.7001018135. The cubic root of 3654649856 is about 1540.3352640503.

The spelling of 3654649856 in words is "three billion, six hundred fifty-four million, six hundred forty-nine thousand, eight hundred fifty-six".