318751756129 has 2 divisors, whose sum is σ = 318751756130. Its totient is φ = 318751756128.

The previous prime is 318751756121. The next prime is 318751756139. The reversal of 318751756129 is 921657157813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317571696225 + 1180059904 = 563535^2 + 34352^2 .

It is a cyclic number.

It is not a de Polignac number, because 318751756129 - 2³ = 318751756121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318751756129.

It is not a weakly prime, because it can be changed into another prime (318751756121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159375878064 + 159375878065.

It is an arithmetic number, because the mean of its divisors is an integer number (159375878065).

Almost surely, 2^318751756129 is an apocalyptic number.

It is an amenable number.

318751756129 is a deficient number, since it is larger than the sum of its proper divisors (1).

318751756129 is an equidigital number, since it uses as much as digits as its factorization.

318751756129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 55.

The spelling of 318751756129 in words is "three hundred eighteen billion, seven hundred fifty-one million, seven hundred fifty-six thousand, one hundred twenty-nine".