16598003993 has 2 divisors, whose sum is σ = 16598003994. Its totient is φ = 16598003992.

The previous prime is 16598003977. The next prime is 16598004029. The reversal of 16598003993 is 39930089561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14816488729 + 1781515264 = 121723^2 + 42208^2 .

It is a cyclic number.

It is not a de Polignac number, because 16598003993 - 2⁴ = 16598003977 is a prime.

It is not a weakly prime, because it can be changed into another prime (16598003923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8299001996 + 8299001997.

It is an arithmetic number, because the mean of its divisors is an integer number (8299001997).

Almost surely, 2^16598003993 is an apocalyptic number.

It is an amenable number.

16598003993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16598003993 is an equidigital number, since it uses as much as digits as its factorization.

16598003993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 16598003993 in words is "sixteen billion, five hundred ninety-eight million, three thousand, nine hundred ninety-three".