311478906785 has 8 divisors (see below), whose sum is σ = 373780840680. Its totient is φ = 249179023744.

The previous prime is 311478906751. The next prime is 311478906797. The reversal of 311478906785 is 587609874113.

It can be written as a sum of positive squares in 4 ways, for example, as 175173220369 + 136305686416 = 418537^2 + 369196^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 311478906785 - 2¹⁶ = 311478841249 is a prime.

It is an unprimeable number.

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, 156020 + ... + 804549.

It is an arithmetic number, because the mean of its divisors is an integer number (46722605085).

Almost surely, 2^311478906785 is an apocalyptic number.

It is an amenable number.

311478906785 is a deficient number, since it is larger than the sum of its proper divisors (62301933895).

311478906785 is an equidigital number, since it uses as much as digits as its factorization.

311478906785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025427.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 311478906785 in words is "three hundred eleven billion, four hundred seventy-eight million, nine hundred six thousand, seven hundred eighty-five".