311023203309978 has 32 divisors (see below), whose sum is σ = 623578271664192. Its totient is φ = 103419133171200.

The previous prime is 311023203309971. The next prime is 311023203309979. The reversal of 311023203309978 is 879903302320113.

It is a self number, because there is not a number n which added to its sum of digits gives 311023203309978.

It is not an unprimeable number, because it can be changed into a prime (311023203309971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23668650 + ... + 34383882.

It is an arithmetic number, because the mean of its divisors is an integer number (19486820989506).

Almost surely, 2^{311023203309978} is an apocalyptic number.

311023203309978 is an abundant number, since it is smaller than the sum of its proper divisors (312555068354214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311023203309978 is a wasteful number, since it uses less digits than its factorization.

311023203309978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10727150.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 311023203309978 in words is "three hundred eleven trillion, twenty-three billion, two hundred three million, three hundred nine thousand, nine hundred seventy-eight".