8642951671 has 2 divisors, whose sum is σ = 8642951672. Its totient is φ = 8642951670.

The previous prime is 8642951617. The next prime is 8642951689. The reversal of 8642951671 is 1761592468.

It is a happy number.

Together with previous prime (8642951617) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8642951671 - 2⁷ = 8642951543 is a prime.

It is a super-2 number, since 2×8642951671² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8642951371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321475835 + 4321475836.

It is an arithmetic number, because the mean of its divisors is an integer number (4321475836).

Almost surely, 2^8642951671 is an apocalyptic number.

8642951671 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642951671 is an equidigital number, since it uses as much as digits as its factorization.

8642951671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 8642951671 is about 92967.4764151421. The cubic root of 8642951671 is about 2052.2047800748.

The spelling of 8642951671 in words is "eight billion, six hundred forty-two million, nine hundred fifty-one thousand, six hundred seventy-one".