6540819 has 8 divisors (see below), whose sum is σ = 8736000. Its totient is φ = 4353096.

The previous prime is 6540739. The next prime is 6540827. The reversal of 6540819 is 9180456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6540819 - 2⁷ = 6540691 is a prime.

It is a super-2 number, since 2×6540819² = 85564626381522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6540819.

It is not an unprimeable number, because it can be changed into a prime (6540829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682 + ... + 3680.

It is an arithmetic number, because the mean of its divisors is an integer number (1092000).

Almost surely, 2^6540819 is an apocalyptic number.

6540819 is a deficient number, since it is larger than the sum of its proper divisors (2195181).

6540819 is a wasteful number, since it uses less digits than its factorization.

6540819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 6540819 is about 2557.5024926674. The cubic root of 6540819 is about 187.0154028511.

The spelling of 6540819 in words is "six million, five hundred forty thousand, eight hundred nineteen".