320865774197 has 4 divisors (see below), whose sum is σ = 321890904780. Its totient is φ = 319840643616.

The previous prime is 320865774181. The next prime is 320865774209. The reversal of 320865774197 is 791477568023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154511100241 + 166354673956 = 393079^2 + 407866^2 .

It is a cyclic number.

It is not a de Polignac number, because 320865774197 - 2⁴ = 320865774181 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 (320865774127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512564822 + ... + 512565447.

It is an arithmetic number, because the mean of its divisors is an integer number (80472726195).

It is a 1-persistent number, because it is pandigital, but 2⋅320865774197 = 641731548394 is not.

Almost surely, 2^320865774197 is an apocalyptic number.

It is an amenable number.

320865774197 is a deficient number, since it is larger than the sum of its proper divisors (1025130583).

320865774197 is a wasteful number, since it uses less digits than its factorization.

320865774197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025130582.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 320865774197 in words is "three hundred twenty billion, eight hundred sixty-five million, seven hundred seventy-four thousand, one hundred ninety-seven".