6511538043 has 12 divisors (see below), whose sum is σ = 9412768248. Its totient is φ = 4337696160.

The previous prime is 6511538039. The next prime is 6511538053. The reversal of 6511538043 is 3408351156.

It is not a de Polignac number, because 6511538043 - 2² = 6511538039 is a prime.

It is a super-3 number, since 3×6511538043³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6511537989 and 6511538007.

It is not an unprimeable number, because it can be changed into a prime (6511538053) 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, 265018 + ... + 288543.

It is an arithmetic number, because the mean of its divisors is an integer number (784397354).

Almost surely, 2^6511538043 is an apocalyptic number.

6511538043 is a deficient number, since it is larger than the sum of its proper divisors (2901230205).

6511538043 is a wasteful number, since it uses less digits than its factorization.

6511538043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554874 (or 554871 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6511538043 is about 80694.1016617696. The cubic root of 6511538043 is about 1867.3591788569.

Adding to 6511538043 its reverse (3408351156), we get a palindrome (9919889199).

The spelling of 6511538043 in words is "six billion, five hundred eleven million, five hundred thirty-eight thousand, forty-three".