68406647371 has 2 divisors, whose sum is σ = 68406647372. Its totient is φ = 68406647370.

The previous prime is 68406647347. The next prime is 68406647377. The reversal of 68406647371 is 17374660486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68406647371 - 2⁹ = 68406646859 is a prime.

It is not a weakly prime, because it can be changed into another prime (68406647377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34203323685 + 34203323686.

It is an arithmetic number, because the mean of its divisors is an integer number (34203323686).

Almost surely, 2^68406647371 is an apocalyptic number.

68406647371 is a deficient number, since it is larger than the sum of its proper divisors (1).

68406647371 is an equidigital number, since it uses as much as digits as its factorization.

68406647371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 68406647371 in words is "sixty-eight billion, four hundred six million, six hundred forty-seven thousand, three hundred seventy-one".