4347121644 has 54 divisors (see below), whose sum is σ = 11571492660. Its totient is φ = 1372230720.

The previous prime is 4347121631. The next prime is 4347121651. The reversal of 4347121644 is 4461217434.

4347121644 is a `hidden beast` number, since 4 + 3 + 4 + 7 + 1 + 2 + 1 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4347121599 and 4347121608.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1723104 + ... + 1725624.

Almost surely, 2^4347121644 is an apocalyptic number.

It is an amenable number.

4347121644 is an abundant number, since it is smaller than the sum of its proper divisors (7224371016).

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

4347121644 is a wasteful number, since it uses less digits than its factorization.

4347121644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071 (or 2545 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 4347121644 is about 65932.7054199962. The cubic root of 4347121644 is about 1632.0517708130.

The spelling of 4347121644 in words is "four billion, three hundred forty-seven million, one hundred twenty-one thousand, six hundred forty-four".