68598767381 has 2 divisors, whose sum is σ = 68598767382. Its totient is φ = 68598767380.

The previous prime is 68598767329. The next prime is 68598767401. The reversal of 68598767381 is 18376789586.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64787557156 + 3811210225 = 254534^2 + 61735^2 .

It is a cyclic number.

It is not a de Polignac number, because 68598767381 - 2⁶ = 68598767317 is a prime.

It is a super-2 number, since 2×68598767381² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68598767311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34299383690 + 34299383691.

It is an arithmetic number, because the mean of its divisors is an integer number (34299383691).

Almost surely, 2^68598767381 is an apocalyptic number.

It is an amenable number.

68598767381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68598767381 is an equidigital number, since it uses as much as digits as its factorization.

68598767381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121927680, while the sum is 68.

The spelling of 68598767381 in words is "sixty-eight billion, five hundred ninety-eight million, seven hundred sixty-seven thousand, three hundred eighty-one".