65490768806 has 4 divisors (see below), whose sum is σ = 98236153212. Its totient is φ = 32745384402.

The previous prime is 65490768803. The next prime is 65490768877. The reversal of 65490768806 is 60886709456.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65490768803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16372692200 + ... + 16372692203.

It is an arithmetic number, because the mean of its divisors is an integer number (24559038303).

Almost surely, 2^65490768806 is an apocalyptic number.

65490768806 is a deficient number, since it is larger than the sum of its proper divisors (32745384406).

65490768806 is a wasteful number, since it uses less digits than its factorization.

65490768806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32745384405.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 65490768806 in words is "sixty-five billion, four hundred ninety million, seven hundred sixty-eight thousand, eight hundred six".