4551631644 has 48 divisors (see below), whose sum is σ = 12665415168. Its totient is φ = 1243923648.

The previous prime is 4551631639. The next prime is 4551631661. The reversal of 4551631644 is 4461361554.

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, 1176027 + ... + 1179890.

It is an arithmetic number, because the mean of its divisors is an integer number (263862816).

Almost surely, 2^4551631644 is an apocalyptic number.

It is an amenable number.

4551631644 is an abundant number, since it is smaller than the sum of its proper divisors (8113783524).

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

4551631644 is a wasteful number, since it uses less digits than its factorization.

4551631644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355954 (or 2355952 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 4551631644 is about 67465.7812820692. The cubic root of 4551631644 is about 1657.2538477738.

The spelling of 4551631644 in words is "four billion, five hundred fifty-one million, six hundred thirty-one thousand, six hundred forty-four".