311161778813 has 8 divisors (see below), whose sum is σ = 334507624320. Its totient is φ = 288512824320.

The previous prime is 311161778777. The next prime is 311161778843. The reversal of 311161778813 is 318877161113.

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 311161778813 - 2¹⁶ = 311161713277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311161778843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174221828 + ... + 174223613.

It is an arithmetic number, because the mean of its divisors is an integer number (41813453040).

Almost surely, 2^311161778813 is an apocalyptic number.

It is an amenable number.

311161778813 is a deficient number, since it is larger than the sum of its proper divisors (23345845507).

311161778813 is a wasteful number, since it uses less digits than its factorization.

311161778813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348445507.

The product of its digits is 169344, while the sum is 47.

The spelling of 311161778813 in words is "three hundred eleven billion, one hundred sixty-one million, seven hundred seventy-eight thousand, eight hundred thirteen".