68311881107 has 2 divisors, whose sum is σ = 68311881108. Its totient is φ = 68311881106.

The previous prime is 68311881091. The next prime is 68311881151. The reversal of 68311881107 is 70118811386.

It is an a-pointer prime, because the next prime (68311881151) can be obtained adding 68311881107 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68311881107 - 2⁴ = 68311881091 is a prime.

It is not a weakly prime, because it can be changed into another prime (68311881007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34155940553 + 34155940554.

It is an arithmetic number, because the mean of its divisors is an integer number (34155940554).

Almost surely, 2^68311881107 is an apocalyptic number.

68311881107 is a deficient number, since it is larger than the sum of its proper divisors (1).

68311881107 is an equidigital number, since it uses as much as digits as its factorization.

68311881107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 68311881107 in words is "sixty-eight billion, three hundred eleven million, eight hundred eighty-one thousand, one hundred seven".