68615656337 has 2 divisors, whose sum is σ = 68615656338. Its totient is φ = 68615656336.

The previous prime is 68615656321. The next prime is 68615656391. The reversal of 68615656337 is 73365651686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62338104976 + 6277551361 = 249676^2 + 79231^2 .

It is a cyclic number.

It is not a de Polignac number, because 68615656337 - 2⁴ = 68615656321 is a prime.

It is not a weakly prime, because it can be changed into another prime (68615659337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34307828168 + 34307828169.

It is an arithmetic number, because the mean of its divisors is an integer number (34307828169).

Almost surely, 2^68615656337 is an apocalyptic number.

It is an amenable number.

68615656337 is a deficient number, since it is larger than the sum of its proper divisors (1).

68615656337 is an equidigital number, since it uses as much as digits as its factorization.

68615656337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 56.

The spelling of 68615656337 in words is "sixty-eight billion, six hundred fifteen million, six hundred fifty-six thousand, three hundred thirty-seven".