319758321961 has 4 divisors (see below), whose sum is σ = 344355115972. Its totient is φ = 295161527952.

The previous prime is 319758321943. The next prime is 319758322019. The reversal of 319758321961 is 169123857913.

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 65761473600 + 253996848361 = 256440^2 + 503981^2 .

It is a cyclic number.

It is not a de Polignac number, because 319758321961 - 2¹³ = 319758313769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319758321941) 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, 12298396986 + ... + 12298397011.

It is an arithmetic number, because the mean of its divisors is an integer number (86088778993).

Almost surely, 2^319758321961 is an apocalyptic number.

It is an amenable number.

319758321961 is a deficient number, since it is larger than the sum of its proper divisors (24596794011).

319758321961 is a wasteful number, since it uses less digits than its factorization.

319758321961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24596794010.

The product of its digits is 2449440, while the sum is 55.

The spelling of 319758321961 in words is "three hundred nineteen billion, seven hundred fifty-eight million, three hundred twenty-one thousand, nine hundred sixty-one".