311845879661 has 16 divisors (see below), whose sum is σ = 326178526080. Its totient is φ = 297578603520.

The previous prime is 311845879649. The next prime is 311845879669. The reversal of 311845879661 is 166978548113.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311845879661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311845879661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311845879669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17549021 + ... + 17566781.

It is an arithmetic number, because the mean of its divisors is an integer number (20386157880).

Almost surely, 2^311845879661 is an apocalyptic number.

It is an amenable number.

311845879661 is a deficient number, since it is larger than the sum of its proper divisors (14332646419).

311845879661 is a wasteful number, since it uses less digits than its factorization.

311845879661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19556.

The product of its digits is 8709120, while the sum is 59.

The spelling of 311845879661 in words is "three hundred eleven billion, eight hundred forty-five million, eight hundred seventy-nine thousand, six hundred sixty-one".