9651481871 has 2 divisors, whose sum is σ = 9651481872. Its totient is φ = 9651481870.

The previous prime is 9651481849. The next prime is 9651481907. The reversal of 9651481871 is 1781841569.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9651481871 - 2³⁰ = 8577740047 is a prime.

It is a super-2 number, since 2×9651481871² (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 (9651481771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4825740935 + 4825740936.

It is an arithmetic number, because the mean of its divisors is an integer number (4825740936).

Almost surely, 2^9651481871 is an apocalyptic number.

9651481871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9651481871 is an equidigital number, since it uses as much as digits as its factorization.

9651481871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 50.

The square root of 9651481871 is about 98241.9557572018. The cubic root of 9651481871 is about 2129.1095097688.

The spelling of 9651481871 in words is "nine billion, six hundred fifty-one million, four hundred eighty-one thousand, eight hundred seventy-one".