6480202081 has 4 divisors (see below), whose sum is σ = 6586434964. Its totient is φ = 6373969200.

The previous prime is 6480202067. The next prime is 6480202097. The reversal of 6480202081 is 1802020846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1802020846 = 2 ⋅901010423.

It can be written as a sum of positive squares in 2 ways, for example, as 1566893056 + 4913309025 = 39584^2 + 70095^2 .

It is a cyclic number.

It is not a de Polignac number, because 6480202081 - 2⁹ = 6480201569 is a prime.

It is a super-2 number, since 2×6480202081² = 83986038021193461122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6480202031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53116350 + ... + 53116471.

It is an arithmetic number, because the mean of its divisors is an integer number (1646608741).

Almost surely, 2^6480202081 is an apocalyptic number.

6480202081 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6480202081 is a deficient number, since it is larger than the sum of its proper divisors (106232883).

6480202081 is a wasteful number, since it uses less digits than its factorization.

6480202081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106232882.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 6480202081 is about 80499.7023659094. The cubic root of 6480202081 is about 1864.3588833910.

The spelling of 6480202081 in words is "six billion, four hundred eighty million, two hundred two thousand, eighty-one".