68069675521 has 2 divisors, whose sum is σ = 68069675522. Its totient is φ = 68069675520.

The previous prime is 68069675501. The next prime is 68069675563. The reversal of 68069675521 is 12557696086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68066201025 + 3474496 = 260895^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 68069675521 - 2⁵ = 68069675489 is a prime.

It is not a weakly prime, because it can be changed into another prime (68069675501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34034837760 + 34034837761.

It is an arithmetic number, because the mean of its divisors is an integer number (34034837761).

Almost surely, 2^68069675521 is an apocalyptic number.

It is an amenable number.

68069675521 is a deficient number, since it is larger than the sum of its proper divisors (1).

68069675521 is an equidigital number, since it uses as much as digits as its factorization.

68069675521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 55.

It can be divided in two parts, 68069 and 675521, that added together give a triangular number (743590 = T₁₂₁₉).

The spelling of 68069675521 in words is "sixty-eight billion, sixty-nine million, six hundred seventy-five thousand, five hundred twenty-one".