312788856320881 has 2 divisors, whose sum is σ = 312788856320882. Its totient is φ = 312788856320880.

The previous prime is 312788856320867. The next prime is 312788856320923. The reversal of 312788856320881 is 188023658887213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270595920040000 + 42192936280881 = 16449800^2 + 6495609^2 .

It is a cyclic number.

It is not a de Polignac number, because 312788856320881 - 2⁵ = 312788856320849 is a prime.

It is a super-3 number, since 3×312788856320881³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 312788856320881.

It is not a weakly prime, because it can be changed into another prime (312788856320861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156394428160440 + 156394428160441.

It is an arithmetic number, because the mean of its divisors is an integer number (156394428160441).

Almost surely, 2^{312788856320881} is an apocalyptic number.

It is an amenable number.

312788856320881 is a deficient number, since it is larger than the sum of its proper divisors (1).

312788856320881 is an equidigital number, since it uses as much as digits as its factorization.

312788856320881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 247726080, while the sum is 70.

The spelling of 312788856320881 in words is "three hundred twelve trillion, seven hundred eighty-eight billion, eight hundred fifty-six million, three hundred twenty thousand, eight hundred eighty-one".