65198667813 has 4 divisors (see below), whose sum is σ = 86931557088. Its totient is φ = 43465778540.

The previous prime is 65198667811. The next prime is 65198667839. The reversal of 65198667813 is 31876689156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65198667813 - 2¹ = 65198667811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65198667811) 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 3 ways as a sum of consecutive naturals, for example, 10866444633 + ... + 10866444638.

It is an arithmetic number, because the mean of its divisors is an integer number (21732889272).

Almost surely, 2^65198667813 is an apocalyptic number.

It is an amenable number.

65198667813 is a deficient number, since it is larger than the sum of its proper divisors (21732889275).

65198667813 is a wasteful number, since it uses less digits than its factorization.

65198667813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21732889274.

The product of its digits is 13063680, while the sum is 60.

The spelling of 65198667813 in words is "sixty-five billion, one hundred ninety-eight million, six hundred sixty-seven thousand, eight hundred thirteen".