70827925808681 has 2 divisors, whose sum is σ = 70827925808682. Its totient is φ = 70827925808680.

The previous prime is 70827925808603. The next prime is 70827925808683. The reversal of 70827925808681 is 18680852972807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59652838425625 + 11175087383056 = 7723525^2 + 3342916^2 .

It is an emirp because it is prime and its reverse (18680852972807) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70827925808681 is a prime.

It is a super-2 number, since 2×70827925808681² (a number of 29 digits) contains 22 as substring.

Together with 70827925808683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70827925808683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35413962904340 + 35413962904341.

It is an arithmetic number, because the mean of its divisors is an integer number (35413962904341).

Almost surely, 2^{70827925808681} is an apocalyptic number.

It is an amenable number.

70827925808681 is a deficient number, since it is larger than the sum of its proper divisors (1).

70827925808681 is an equidigital number, since it uses as much as digits as its factorization.

70827925808681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216760320, while the sum is 71.

The spelling of 70827925808681 in words is "seventy trillion, eight hundred twenty-seven billion, nine hundred twenty-five million, eight hundred eight thousand, six hundred eighty-one".