4388651645 has 16 divisors (see below), whose sum is σ = 6103496448. Its totient is φ = 2966974080.

The previous prime is 4388651639. The next prime is 4388651669. The reversal of 4388651645 is 5461568834.

It is not a de Polignac number, because 4388651645 - 2⁴ = 4388651629 is a prime.

It is a super-2 number, since 2×4388651645² = 38520526522322412050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4388651593 and 4388651602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880544 + ... + 885513.

It is an arithmetic number, because the mean of its divisors is an integer number (381468528).

Almost surely, 2^4388651645 is an apocalyptic number.

It is an amenable number.

4388651645 is a deficient number, since it is larger than the sum of its proper divisors (1714844803).

4388651645 is a wasteful number, since it uses less digits than its factorization.

4388651645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766140.

The product of its digits is 2764800, while the sum is 50.

The square root of 4388651645 is about 66246.8991349784. The cubic root of 4388651645 is about 1637.2325482044.

The spelling of 4388651645 in words is "four billion, three hundred eighty-eight million, six hundred fifty-one thousand, six hundred forty-five".