68261525939 has 2 divisors, whose sum is σ = 68261525940. Its totient is φ = 68261525938.

The previous prime is 68261525933. The next prime is 68261525987. The reversal of 68261525939 is 93952516286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68261525939 - 2¹² = 68261521843 is a prime.

It is not a weakly prime, because it can be changed into another prime (68261525933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34130762969 + 34130762970.

It is an arithmetic number, because the mean of its divisors is an integer number (34130762970).

Almost surely, 2^68261525939 is an apocalyptic number.

68261525939 is a deficient number, since it is larger than the sum of its proper divisors (1).

68261525939 is an equidigital number, since it uses as much as digits as its factorization.

68261525939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 56.

The spelling of 68261525939 in words is "sixty-eight billion, two hundred sixty-one million, five hundred twenty-five thousand, nine hundred thirty-nine".