999768013481 has 2 divisors, whose sum is σ = 999768013482. Its totient is φ = 999768013480.

The previous prime is 999768013427. The next prime is 999768013537. The reversal of 999768013481 is 184310867999.

999768013481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999768013456 + 25 = 999884^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 999768013481 - 2²⁶ = 999700904617 is a prime.

It is a super-2 number, since 2×999768013481² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999768013421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499884006740 + 499884006741.

It is an arithmetic number, because the mean of its divisors is an integer number (499884006741).

Almost surely, 2^999768013481 is an apocalyptic number.

It is an amenable number.

999768013481 is a deficient number, since it is larger than the sum of its proper divisors (1).

999768013481 is an equidigital number, since it uses as much as digits as its factorization.

999768013481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 65.

The spelling of 999768013481 in words is "nine hundred ninety-nine billion, seven hundred sixty-eight million, thirteen thousand, four hundred eighty-one".