5551356440 has 32 divisors (see below), whose sum is σ = 14274917280. Its totient is φ = 1903322112.

The previous prime is 5551356439. The next prime is 5551356451. The reversal of 5551356440 is 446531555.

It is a junction number, because it is equal to n+sod(n) for n = 5551356394 and 5551356403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9912857 + ... + 9913416.

It is an arithmetic number, because the mean of its divisors is an integer number (446091165).

Almost surely, 2^5551356440 is an apocalyptic number.

It is an amenable number.

5551356440 is an abundant number, since it is smaller than the sum of its proper divisors (8723560840).

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

5551356440 is a wasteful number, since it uses less digits than its factorization.

5551356440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19826291 (or 19826287 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 5551356440 is about 74507.4254017678. The cubic root of 5551356440 is about 1770.6512802199.

Adding to 5551356440 its reverse (446531555), we get a palindrome (5997887995).

The spelling of 5551356440 in words is "five billion, five hundred fifty-one million, three hundred fifty-six thousand, four hundred forty".