6541326506 has 48 divisors (see below), whose sum is σ = 11618069760. Its totient is φ = 2738136960.

The previous prime is 6541326481. The next prime is 6541326511. The reversal of 6541326506 is 6056231456.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6541326506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1779086 + ... + 1782758.

It is an arithmetic number, because the mean of its divisors is an integer number (242043120).

Almost surely, 2^6541326506 is an apocalyptic number.

6541326506 is a deficient number, since it is larger than the sum of its proper divisors (5076743254).

6541326506 is a wasteful number, since it uses less digits than its factorization.

6541326506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191 (or 4178 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 6541326506 is about 80878.4675052637. The cubic root of 6541326506 is about 1870.2023960444.

It can be divided in two parts, 65413 and 26506, that added together give a palindrome (91919).

The spelling of 6541326506 in words is "six billion, five hundred forty-one million, three hundred twenty-six thousand, five hundred six".