9650385881 has 2 divisors, whose sum is σ = 9650385882. Its totient is φ = 9650385880.

The previous prime is 9650385859. The next prime is 9650385887. The reversal of 9650385881 is 1885830569.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9509370256 + 141015625 = 97516^2 + 11875^2 .

It is a cyclic number.

It is not a de Polignac number, because 9650385881 - 2¹⁸ = 9650123737 is a prime.

It is a super-2 number, since 2×9650385881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9650385887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4825192940 + 4825192941.

It is an arithmetic number, because the mean of its divisors is an integer number (4825192941).

Almost surely, 2^9650385881 is an apocalyptic number.

It is an amenable number.

9650385881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9650385881 is an equidigital number, since it uses as much as digits as its factorization.

9650385881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The square root of 9650385881 is about 98236.3775848845. The cubic root of 9650385881 is about 2129.0289151998.

The spelling of 9650385881 in words is "nine billion, six hundred fifty million, three hundred eighty-five thousand, eight hundred eighty-one".