3649906944 has 108 divisors (see below), whose sum is σ = 10585567356. Its totient is φ = 1209470976.

The previous prime is 3649906937. The next prime is 3649907003. The reversal of 3649906944 is 4496099463.

It can be written as a sum of positive squares in 2 ways, for example, as 1945868544 + 1704038400 = 44112^2 + 41280^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394014 + ... + 403170.

Almost surely, 2^3649906944 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 3649906944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5292783678).

3649906944 is an abundant number, since it is smaller than the sum of its proper divisors (6935660412).

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

3649906944 is a wasteful number, since it uses less digits than its factorization.

3649906944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9352 (or 9335 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The square root of 3649906944 is about 60414.4597261285. The cubic root of 3649906944 is about 1539.6686395628.

The spelling of 3649906944 in words is "three billion, six hundred forty-nine million, nine hundred six thousand, nine hundred forty-four".