999955444559963 has 2 divisors, whose sum is σ = 999955444559964. Its totient is φ = 999955444559962.

The previous prime is 999955444559917. The next prime is 999955444559999. The reversal of 999955444559963 is 369955444559999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999955444559963 is a prime.

It is a super-2 number, since 2×999955444559963² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999955444559263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499977722279981 + 499977722279982.

It is an arithmetic number, because the mean of its divisors is an integer number (499977722279982).

Almost surely, 2^{999955444559963} is an apocalyptic number.

999955444559963 is a deficient number, since it is larger than the sum of its proper divisors (1).

999955444559963 is an equidigital number, since it uses as much as digits as its factorization.

999955444559963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 382637520000, while the sum is 95.

The spelling of 999955444559963 in words is "nine hundred ninety-nine trillion, nine hundred fifty-five billion, four hundred forty-four million, five hundred fifty-nine thousand, nine hundred sixty-three".