551005334440 has 128 divisors (see below), whose sum is σ = 1443153801600. Its totient is φ = 187219537920.

The previous prime is 551005334417. The next prime is 551005334443. The reversal of 551005334440 is 44433500155.

It is a super-2 number, since 2×551005334440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 551005334396 and 551005334405.

It is not an unprimeable number, because it can be changed into a prime (551005334443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158844 + ... + 1061716.

It is an arithmetic number, because the mean of its divisors is an integer number (11274639075).

Almost surely, 2^551005334440 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 551005334440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721576900800).

551005334440 is an abundant number, since it is smaller than the sum of its proper divisors (892148467160).

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

551005334440 is a wasteful number, since it uses less digits than its factorization.

551005334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902987 (or 902983 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 551005334440 its reverse (44433500155), we get a palindrome (595438834595).

The spelling of 551005334440 in words is "five hundred fifty-one billion, five million, three hundred thirty-four thousand, four hundred forty".