68692697569 has 2 divisors, whose sum is σ = 68692697570. Its totient is φ = 68692697568.

The previous prime is 68692697537. The next prime is 68692697597. The reversal of 68692697569 is 96579629686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68677015969 + 15681600 = 262063^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 68692697569 - 2⁵ = 68692697537 is a prime.

It is a super-2 number, since 2×68692697569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68692697509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34346348784 + 34346348785.

It is an arithmetic number, because the mean of its divisors is an integer number (34346348785).

Almost surely, 2^68692697569 is an apocalyptic number.

It is an amenable number.

68692697569 is a deficient number, since it is larger than the sum of its proper divisors (1).

68692697569 is an equidigital number, since it uses as much as digits as its factorization.

68692697569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529079040, while the sum is 73.

The spelling of 68692697569 in words is "sixty-eight billion, six hundred ninety-two million, six hundred ninety-seven thousand, five hundred sixty-nine".