68167636997 has 2 divisors, whose sum is σ = 68167636998. Its totient is φ = 68167636996.

The previous prime is 68167636991. The next prime is 68167637003. The reversal of 68167636997 is 79963676186.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (68167636991) and next prime (68167637003).

It can be written as a sum of positive squares in only one way, i.e., 64981147396 + 3186489601 = 254914^2 + 56449^2 .

It is a cyclic number.

It is not a de Polignac number, because 68167636997 - 2²⁰ = 68166588421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68167636991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34083818498 + 34083818499.

It is an arithmetic number, because the mean of its divisors is an integer number (34083818499).

Almost surely, 2^68167636997 is an apocalyptic number.

It is an amenable number.

68167636997 is a deficient number, since it is larger than the sum of its proper divisors (1).

68167636997 is an equidigital number, since it uses as much as digits as its factorization.

68167636997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123451776, while the sum is 68.

The spelling of 68167636997 in words is "sixty-eight billion, one hundred sixty-seven million, six hundred thirty-six thousand, nine hundred ninety-seven".