68570717687 has 2 divisors, whose sum is σ = 68570717688. Its totient is φ = 68570717686.

The previous prime is 68570717671. The next prime is 68570717707. The reversal of 68570717687 is 78671707586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68570717687 - 2⁴ = 68570717671 is a prime.

It is a super-2 number, since 2×68570717687² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68570717617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34285358843 + 34285358844.

It is an arithmetic number, because the mean of its divisors is an integer number (34285358844).

Almost surely, 2^68570717687 is an apocalyptic number.

68570717687 is a deficient number, since it is larger than the sum of its proper divisors (1).

68570717687 is an equidigital number, since it uses as much as digits as its factorization.

68570717687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27659520, while the sum is 62.

The spelling of 68570717687 in words is "sixty-eight billion, five hundred seventy million, seven hundred seventeen thousand, six hundred eighty-seven".