5551813044 has 36 divisors (see below), whose sum is σ = 14107242240. Its totient is φ = 1840913040.

The previous prime is 5551813013. The next prime is 5551813049. The reversal of 5551813044 is 4403181555.

5551813044 is a `hidden beast` number, since 5 + 5 + 518 + 130 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551813049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396834 + ... + 410585.

It is an arithmetic number, because the mean of its divisors is an integer number (391867840).

Almost surely, 2^5551813044 is an apocalyptic number.

It is an amenable number.

5551813044 is an abundant number, since it is smaller than the sum of its proper divisors (8555429196).

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

5551813044 is a wasteful number, since it uses less digits than its factorization.

5551813044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807620 (or 807615 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 5551813044 is about 74510.4894897356. The cubic root of 5551813044 is about 1770.6998247694.

Adding to 5551813044 its reverse (4403181555), we get a palindrome (9954994599).

The spelling of 5551813044 in words is "five billion, five hundred fifty-one million, eight hundred thirteen thousand, forty-four".