5511437640 has 80 divisors (see below), whose sum is σ = 18524565180. Its totient is φ = 1469715840.

The previous prime is 5511437627. The next prime is 5511437653. The reversal of 5511437640 is 467341155.

5511437640 is a `hidden beast` number, since 5 + 5 + 1 + 1 + 4 + 3 + 7 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (5511437627) and next prime (5511437653).

It can be written as a sum of positive squares in 2 ways, for example, as 5254220196 + 257217444 = 72486^2 + 16038^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 5511437595 and 5511437604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 847291 + ... + 853770.

Almost surely, 2^5511437640 is an apocalyptic number.

It is an amenable number.

5511437640 is an abundant number, since it is smaller than the sum of its proper divisors (13013127540).

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

5511437640 is a wasteful number, since it uses less digits than its factorization.

5511437640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701084 (or 1701071 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 5511437640 is about 74239.0573754813. The cubic root of 5511437640 is about 1766.3969220690.

Adding to 5511437640 its reverse (467341155), we get a palindrome (5978778795).

The spelling of 5511437640 in words is "five billion, five hundred eleven million, four hundred thirty-seven thousand, six hundred forty".