4551891328 has 32 divisors (see below), whose sum is σ = 9139656960. Its totient is φ = 2258016768.

The previous prime is 4551891307. The next prime is 4551891329. The reversal of 4551891328 is 8231981554.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4551891329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123751 + ... + 156262.

It is an arithmetic number, because the mean of its divisors is an integer number (285614280).

Almost surely, 2^4551891328 is an apocalyptic number.

It is an amenable number.

4551891328 is an abundant number, since it is smaller than the sum of its proper divisors (4587765632).

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

4551891328 is a wasteful number, since it uses less digits than its factorization.

4551891328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280154 (or 280142 counting only the distinct ones).

The product of its digits is 345600, while the sum is 46.

The square root of 4551891328 is about 67467.7058154492. The cubic root of 4551891328 is about 1657.2853642466.

The spelling of 4551891328 in words is "four billion, five hundred fifty-one million, eight hundred ninety-one thousand, three hundred twenty-eight".