9999767651329 has 2 divisors, whose sum is σ = 9999767651330. Its totient is φ = 9999767651328.

The previous prime is 9999767651309. The next prime is 9999767651347. The reversal of 9999767651329 is 9231567679999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9257323482225 + 742444169104 = 3042585^2 + 861652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999767651329 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999767651309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999883825664 + 4999883825665.

It is an arithmetic number, because the mean of its divisors is an integer number (4999883825665).

Almost surely, 2^{9999767651329} is an apocalyptic number.

It is an amenable number.

9999767651329 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999767651329 is an equidigital number, since it uses as much as digits as its factorization.

9999767651329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3124873080, while the sum is 82.

The spelling of 9999767651329 in words is "nine trillion, nine hundred ninety-nine billion, seven hundred sixty-seven million, six hundred fifty-one thousand, three hundred twenty-nine".