65198935491 has 8 divisors (see below), whose sum is σ = 86933867280. Its totient is φ = 43464980352.

The previous prime is 65198935489. The next prime is 65198935511. The reversal of 65198935491 is 19453989156.

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

It is not a de Polignac number, because 65198935491 - 2¹ = 65198935489 is a prime.

It is a super-2 number, since 2×65198935491² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65198935441) by changing a digit.

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, 70810 + ... + 367983.

It is an arithmetic number, because the mean of its divisors is an integer number (10866733410).

Almost surely, 2^65198935491 is an apocalyptic number.

65198935491 is a deficient number, since it is larger than the sum of its proper divisors (21734931789).

65198935491 is a wasteful number, since it uses less digits than its factorization.

65198935491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488325.

The product of its digits is 10497600, while the sum is 60.

The spelling of 65198935491 in words is "sixty-five billion, one hundred ninety-eight million, nine hundred thirty-five thousand, four hundred ninety-one".