551611648 has 144 divisors (see below), whose sum is σ = 1403982720. Its totient is φ = 210567168.

The previous prime is 551611633. The next prime is 551611649. The reversal of 551611648 is 846116155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551611649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578340 + ... + 579292.

It is an arithmetic number, because the mean of its divisors is an integer number (9749880).

Almost surely, 2^551611648 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 551611648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (701991360).

551611648 is an abundant number, since it is smaller than the sum of its proper divisors (852371072).

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

551611648 is a wasteful number, since it uses less digits than its factorization.

551611648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 998 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 551611648 is about 23486.4141153987. The cubic root of 551611648 is about 820.1207674597.

The spelling of 551611648 in words is "five hundred fifty-one million, six hundred eleven thousand, six hundred forty-eight".