3673651644 has 144 divisors (see below), whose sum is σ = 10415653248. Its totient is φ = 1125482688.

The previous prime is 3673651633. The next prime is 3673651649. The reversal of 3673651644 is 4461563763.

3673651644 is a `hidden beast` number, since 3 + 67 + 36 + 516 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 3673651644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3673651649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3878779 + ... + 3879725.

Almost surely, 2^3673651644 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 3673651644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5207826624).

3673651644 is an abundant number, since it is smaller than the sum of its proper divisors (6742001604).

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

3673651644 is a wasteful number, since it uses less digits than its factorization.

3673651644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1272 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 3673651644 is about 60610.6561917952. The cubic root of 3673651644 is about 1543.0002291899. Note that the first 3 decimals are identical.

The spelling of 3673651644 in words is "three billion, six hundred seventy-three million, six hundred fifty-one thousand, six hundred forty-four".