6501280849 has 12 divisors (see below), whose sum is σ = 7601910564. Its totient is φ = 5543645184.

The previous prime is 6501280843. The next prime is 6501280853. The reversal of 6501280849 is 9480821056.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 854509824 + 5646771025 = 29232^2 + 75145^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6501280849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6501280843) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 334272 + ... + 353185.

It is an arithmetic number, because the mean of its divisors is an integer number (633492547).

Almost surely, 2^6501280849 is an apocalyptic number.

It is an amenable number.

6501280849 is a deficient number, since it is larger than the sum of its proper divisors (1100629715).

6501280849 is a wasteful number, since it uses less digits than its factorization.

6501280849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687664 (or 687657 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 6501280849 is about 80630.5205799888. The cubic root of 6501280849 is about 1866.3781545418.

The spelling of 6501280849 in words is "six billion, five hundred one million, two hundred eighty thousand, eight hundred forty-nine".