68100886771061 has 4 divisors (see below), whose sum is σ = 68101002084300. Its totient is φ = 68100771457824.

The previous prime is 68100886771039. The next prime is 68100886771069. The reversal of 68100886771061 is 16017768800186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35185136070436 + 32915750700625 = 5931706^2 + 5737225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68100886771061 is a prime.

It is a super-2 number, since 2×68100886771061² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68100886771069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56766176 + ... + 57953433.

It is an arithmetic number, because the mean of its divisors is an integer number (17025250521075).

Almost surely, 2^{68100886771061} is an apocalyptic number.

It is an amenable number.

68100886771061 is a deficient number, since it is larger than the sum of its proper divisors (115313239).

68100886771061 is a wasteful number, since it uses less digits than its factorization.

68100886771061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115313238.

The product of its (nonzero) digits is 5419008, while the sum is 59.

The spelling of 68100886771061 in words is "sixty-eight trillion, one hundred billion, eight hundred eighty-six million, seven hundred seventy-one thousand, sixty-one".