6506478133 has 4 divisors (see below), whose sum is σ = 6542425708. Its totient is φ = 6470530560.

The previous prime is 6506478113. The next prime is 6506478137. The reversal of 6506478133 is 3318746056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 828403524 + 5678074609 = 28782^2 + 75353^2 .

It is a cyclic number.

It is not a de Polignac number, because 6506478133 - 2²⁵ = 6472923701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6506478133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506478137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17973516 + ... + 17973877.

It is an arithmetic number, because the mean of its divisors is an integer number (1635606427).

Almost surely, 2^6506478133 is an apocalyptic number.

It is an amenable number.

6506478133 is a deficient number, since it is larger than the sum of its proper divisors (35947575).

6506478133 is a wasteful number, since it uses less digits than its factorization.

6506478133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35947574.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 6506478133 is about 80662.7431532055. The cubic root of 6506478133 is about 1866.8753649562.

The spelling of 6506478133 in words is "six billion, five hundred six million, four hundred seventy-eight thousand, one hundred thirty-three".