68510851 has 2 divisors, whose sum is σ = 68510852. Its totient is φ = 68510850.

The previous prime is 68510843. The next prime is 68510857. The reversal of 68510851 is 15801586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68510851 - 2³ = 68510843 is a prime.

It is not a weakly prime, because it can be changed into another prime (68510857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34255425 + 34255426.

It is an arithmetic number, because the mean of its divisors is an integer number (34255426).

Almost surely, 2^68510851 is an apocalyptic number.

68510851 is a deficient number, since it is larger than the sum of its proper divisors (1).

68510851 is an equidigital number, since it uses as much as digits as its factorization.

68510851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 68510851 is about 8277.1281855484. The cubic root of 68510851 is about 409.1850777321.

The spelling of 68510851 in words is "sixty-eight million, five hundred ten thousand, eight hundred fifty-one".