673551648 has 216 divisors, whose sum is σ = 2431250640. Its totient is φ = 174908160.

The previous prime is 673551647. The next prime is 673551673. The reversal of 673551648 is 846155376.

673551648 is a `hidden beast` number, since 67 + 35 + 516 + 48 = 666.

It is not an unprimeable number, because it can be changed into a prime (673551643) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 153063 + ... + 157401.

It is an arithmetic number, because the mean of its divisors is an integer number (11255790).

Almost surely, 2^673551648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673551648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215625320).

673551648 is an abundant number, since it is smaller than the sum of its proper divisors (1757698992).

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

673551648 is a wasteful number, since it uses less digits than its factorization.

673551648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380 (or 4362 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 673551648 is about 25952.8735981201. The cubic root of 673551648 is about 876.5774637479.

The spelling of 673551648 in words is "six hundred seventy-three million, five hundred fifty-one thousand, six hundred forty-eight".