6425720971 has 2 divisors, whose sum is σ = 6425720972. Its totient is φ = 6425720970.

The previous prime is 6425720947. The next prime is 6425720989. The reversal of 6425720971 is 1790275246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6425720971 - 2⁹ = 6425720459 is a prime.

It is not a weakly prime, because it can be changed into another prime (6428720971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212860485 + 3212860486.

It is an arithmetic number, because the mean of its divisors is an integer number (3212860486).

Almost surely, 2^6425720971 is an apocalyptic number.

6425720971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425720971 is an equidigital number, since it uses as much as digits as its factorization.

6425720971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 6425720971 is about 80160.5948767847. The cubic root of 6425720971 is about 1859.1194208233.

The spelling of 6425720971 in words is "six billion, four hundred twenty-five million, seven hundred twenty thousand, nine hundred seventy-one".