68750630521 has 2 divisors, whose sum is σ = 68750630522. Its totient is φ = 68750630520.

The previous prime is 68750630489. The next prime is 68750630569. The reversal of 68750630521 is 12503605786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57427329600 + 11323300921 = 239640^2 + 106411^2 .

It is a cyclic number.

It is not a de Polignac number, because 68750630521 - 2⁵ = 68750630489 is a prime.

It is not a weakly prime, because it can be changed into another prime (68750630581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34375315260 + 34375315261.

It is an arithmetic number, because the mean of its divisors is an integer number (34375315261).

Almost surely, 2^68750630521 is an apocalyptic number.

It is an amenable number.

68750630521 is a deficient number, since it is larger than the sum of its proper divisors (1).

68750630521 is an equidigital number, since it uses as much as digits as its factorization.

68750630521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 68750630521 in words is "sixty-eight billion, seven hundred fifty million, six hundred thirty thousand, five hundred twenty-one".