6542768965 has 8 divisors (see below), whose sum is σ = 7881874200. Its totient is φ = 5213847552.

The previous prime is 6542768929. The next prime is 6542768983. The reversal of 6542768965 is 5698672456.

It can be written as a sum of positive squares in 4 ways, for example, as 2202331041 + 4340437924 = 46929^2 + 65882^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6542768965 - 2¹³ = 6542760773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2544540 + ... + 2547109.

It is an arithmetic number, because the mean of its divisors is an integer number (985234275).

Almost surely, 2^6542768965 is an apocalyptic number.

It is an amenable number.

6542768965 is a deficient number, since it is larger than the sum of its proper divisors (1339105235).

6542768965 is a wasteful number, since it uses less digits than its factorization.

6542768965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091911.

The product of its digits is 21772800, while the sum is 58.

The square root of 6542768965 is about 80887.3844613608. The cubic root of 6542768965 is about 1870.3398550142.

The spelling of 6542768965 in words is "six billion, five hundred forty-two million, seven hundred sixty-eight thousand, nine hundred sixty-five".