65938791823 has 8 divisors (see below), whose sum is σ = 67065692400. Its totient is φ = 64821016320.

The previous prime is 65938791817. The next prime is 65938791827. The reversal of 65938791823 is 32819783956.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65938791823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65938791827) 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, 2266693 + ... + 2295598.

It is an arithmetic number, because the mean of its divisors is an integer number (8383211550).

Almost surely, 2^65938791823 is an apocalyptic number.

65938791823 is a deficient number, since it is larger than the sum of its proper divisors (1126900577).

65938791823 is a wasteful number, since it uses less digits than its factorization.

65938791823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562537.

The product of its digits is 19595520, while the sum is 61.

The spelling of 65938791823 in words is "sixty-five billion, nine hundred thirty-eight million, seven hundred ninety-one thousand, eight hundred twenty-three".