68008168537 has 2 divisors, whose sum is σ = 68008168538. Its totient is φ = 68008168536.

The previous prime is 68008168471. The next prime is 68008168541. The reversal of 68008168537 is 73586180086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52983292761 + 15024875776 = 230181^2 + 122576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68008168537 is a prime.

It is a super-2 number, since 2×68008168537² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68008168577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34004084268 + 34004084269.

It is an arithmetic number, because the mean of its divisors is an integer number (34004084269).

Almost surely, 2^68008168537 is an apocalyptic number.

It is an amenable number.

68008168537 is a deficient number, since it is larger than the sum of its proper divisors (1).

68008168537 is an equidigital number, since it uses as much as digits as its factorization.

68008168537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 68008168537 in words is "sixty-eight billion, eight million, one hundred sixty-eight thousand, five hundred thirty-seven".