65782194397 has 4 divisors (see below), whose sum is σ = 66574751040. Its totient is φ = 64989637756.

The previous prime is 65782194389. The next prime is 65782194403. The reversal of 65782194397 is 79349128756.

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 65782194397 - 2³ = 65782194389 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 (65782194337) 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 3 ways as a sum of consecutive naturals, for example, 396278197 + ... + 396278362.

It is an arithmetic number, because the mean of its divisors is an integer number (16643687760).

Almost surely, 2^65782194397 is an apocalyptic number.

It is an amenable number.

65782194397 is a deficient number, since it is larger than the sum of its proper divisors (792556643).

65782194397 is an equidigital number, since it uses as much as digits as its factorization.

65782194397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792556642.

The product of its digits is 22861440, while the sum is 61.

The spelling of 65782194397 in words is "sixty-five billion, seven hundred eighty-two million, one hundred ninety-four thousand, three hundred ninety-seven".