999997555301611 has 2 divisors, whose sum is σ = 999997555301612. Its totient is φ = 999997555301610.

The previous prime is 999997555301603. The next prime is 999997555301617. The reversal of 999997555301611 is 116103555799999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999997555301611 - 2³ = 999997555301603 is a prime.

It is a super-2 number, since 2×999997555301611² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999997555301617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998777650805 + 499998777650806.

It is an arithmetic number, because the mean of its divisors is an integer number (499998777650806).

Almost surely, 2^{999997555301611} is an apocalyptic number.

999997555301611 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997555301611 is an equidigital number, since it uses as much as digits as its factorization.

999997555301611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 930021750, while the sum is 79.

The spelling of 999997555301611 in words is "nine hundred ninety-nine trillion, nine hundred ninety-seven billion, five hundred fifty-five million, three hundred one thousand, six hundred eleven".