319512985961 has 8 divisors (see below), whose sum is σ = 344098025544. Its totient is φ = 294928963200.

The previous prime is 319512985933. The next prime is 319512985969. The reversal of 319512985961 is 169589215913.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6517494361 + 312995491600 = 80731^2 + 559460^2 .

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-319512985961 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 319512985961.

It is not an unprimeable number, because it can be changed into a prime (319512985969) 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 7 ways as a sum of consecutive naturals, for example, 476165 + ... + 930461.

It is an arithmetic number, because the mean of its divisors is an integer number (43012253193).

Almost surely, 2^319512985961 is an apocalyptic number.

It is an amenable number.

319512985961 is a deficient number, since it is larger than the sum of its proper divisors (24585039583).

319512985961 is a wasteful number, since it uses less digits than its factorization.

319512985961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508411.

The product of its digits is 5248800, while the sum is 59.

The spelling of 319512985961 in words is "three hundred nineteen billion, five hundred twelve million, nine hundred eighty-five thousand, nine hundred sixty-one".