72685786641971 has 2 divisors, whose sum is σ = 72685786641972. Its totient is φ = 72685786641970.

The previous prime is 72685786641841. The next prime is 72685786642031. The reversal of 72685786641971 is 17914668758627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72685786641971 - 2¹⁴ = 72685786625587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72685786641892 and 72685786641901.

It is not a weakly prime, because it can be changed into another prime (72685786641271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36342893320985 + 36342893320986.

It is an arithmetic number, because the mean of its divisors is an integer number (36342893320986).

Almost surely, 2^{72685786641971} is an apocalyptic number.

72685786641971 is a deficient number, since it is larger than the sum of its proper divisors (1).

72685786641971 is an equidigital number, since it uses as much as digits as its factorization.

72685786641971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1706987520, while the sum is 77.

The spelling of 72685786641971 in words is "seventy-two trillion, six hundred eighty-five billion, seven hundred eighty-six million, six hundred forty-one thousand, nine hundred seventy-one".