311161778812 has 6 divisors (see below), whose sum is σ = 544533112928. Its totient is φ = 155580889404.

The previous prime is 311161778777. The next prime is 311161778843. The reversal of 311161778812 is 218877161113.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38895222348 + ... + 38895222355.

Almost surely, 2^311161778812 is an apocalyptic number.

It is an amenable number.

311161778812 is a deficient number, since it is larger than the sum of its proper divisors (233371334116).

311161778812 is a wasteful number, since it uses less digits than its factorization.

311161778812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77790444707 (or 77790444705 counting only the distinct ones).

The product of its digits is 112896, while the sum is 46.

The spelling of 311161778812 in words is "three hundred eleven billion, one hundred sixty-one million, seven hundred seventy-eight thousand, eight hundred twelve".