4644455551 has 16 divisors (see below), whose sum is σ = 4913568000. Its totient is φ = 4377881088.

The previous prime is 4644455549. The next prime is 4644455587. The reversal of 4644455551 is 1555544464.

It is a cyclic number.

It is not a de Polignac number, because 4644455551 - 2¹ = 4644455549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4644455498 and 4644455507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644455591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4802470 + ... + 4803436.

It is an arithmetic number, because the mean of its divisors is an integer number (307098000).

Almost surely, 2^4644455551 is an apocalyptic number.

4644455551 is a deficient number, since it is larger than the sum of its proper divisors (269112449).

4644455551 is a wasteful number, since it uses less digits than its factorization.

4644455551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998.

The product of its digits is 960000, while the sum is 43.

The square root of 4644455551 is about 68150.2424867293. The cubic root of 4644455551 is about 1668.4438814621.

The spelling of 4644455551 in words is "four billion, six hundred forty-four million, four hundred fifty-five thousand, five hundred fifty-one".