65194821699 has 16 divisors (see below), whose sum is σ = 99899493120. Its totient is φ = 37046057760.

The previous prime is 65194821691. The next prime is 65194821719. The reversal of 65194821699 is 99612849156.

It is not a de Polignac number, because 65194821699 - 2³ = 65194821691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65194821691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8668072 + ... + 8675589.

It is an arithmetic number, because the mean of its divisors is an integer number (6243718320).

Almost surely, 2^65194821699 is an apocalyptic number.

65194821699 is a deficient number, since it is larger than the sum of its proper divisors (34704671421).

65194821699 is a wasteful number, since it uses less digits than its factorization.

65194821699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343850.

The product of its digits is 8398080, while the sum is 60.

The spelling of 65194821699 in words is "sixty-five billion, one hundred ninety-four million, eight hundred twenty-one thousand, six hundred ninety-nine".