9999799764433 has 2 divisors, whose sum is σ = 9999799764434. Its totient is φ = 9999799764432.

The previous prime is 9999799764379. The next prime is 9999799764517. The reversal of 9999799764433 is 3344679979999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8959773050944 + 1040026713489 = 2993288^2 + 1019817^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999799764433 - 2⁴¹ = 7800776508881 is a prime.

It is a super-2 number, since 2×9999799764433² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9999799764133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999899882216 + 4999899882217.

It is an arithmetic number, because the mean of its divisors is an integer number (4999899882217).

Almost surely, 2^{9999799764433} is an apocalyptic number.

It is an amenable number.

9999799764433 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999799764433 is an equidigital number, since it uses as much as digits as its factorization.

9999799764433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22499086176, while the sum is 88.

The spelling of 9999799764433 in words is "nine trillion, nine hundred ninety-nine billion, seven hundred ninety-nine million, seven hundred sixty-four thousand, four hundred thirty-three".