311361621057 has 8 divisors (see below), whose sum is σ = 461276475680. Its totient is φ = 207574414020.

The previous prime is 311361621017. The next prime is 311361621059. The reversal of 311361621057 is 750126163113.

311361621057 is a `hidden beast` number, since 3 + 1 + 13 + 616 + 21 + 0 + 5 + 7 = 666.

It is not a de Polignac number, because 311361621057 - 2⁶ = 311361620993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311361621059) 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, 5765955919 + ... + 5765955972.

It is an arithmetic number, because the mean of its divisors is an integer number (57659559460).

Almost surely, 2^311361621057 is an apocalyptic number.

It is an amenable number.

311361621057 is a deficient number, since it is larger than the sum of its proper divisors (149914854623).

311361621057 is a wasteful number, since it uses less digits than its factorization.

311361621057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531911900 (or 11531911894 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 311361621057 in words is "three hundred eleven billion, three hundred sixty-one million, six hundred twenty-one thousand, fifty-seven".