4000644622 has 8 divisors (see below), whose sum is σ = 6462579816. Its totient is φ = 1846451352.

The previous prime is 4000644589. The next prime is 4000644673. The reversal of 4000644622 is 2264460004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76935448 + ... + 76935499.

It is an arithmetic number, because the mean of its divisors is an integer number (807822477).

Almost surely, 2^4000644622 is an apocalyptic number.

4000644622 is a deficient number, since it is larger than the sum of its proper divisors (2461935194).

4000644622 is a wasteful number, since it uses less digits than its factorization.

4000644622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153870962.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 4000644622 is about 63250.6491824392. The cubic root of 4000644622 is about 1587.4863201913.

The spelling of 4000644622 in words is "four billion, six hundred forty-four thousand, six hundred twenty-two".