16604665031 has 2 divisors, whose sum is σ = 16604665032. Its totient is φ = 16604665030.

The previous prime is 16604665013. The next prime is 16604665037. The reversal of 16604665031 is 13056640661.

Together with previous prime (16604665013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16604665031 - 2¹⁸ = 16604402887 is a prime.

It is a super-2 number, since 2×16604665031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16604665037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8302332515 + 8302332516.

It is an arithmetic number, because the mean of its divisors is an integer number (8302332516).

Almost surely, 2^16604665031 is an apocalyptic number.

16604665031 is a deficient number, since it is larger than the sum of its proper divisors (1).

16604665031 is an equidigital number, since it uses as much as digits as its factorization.

16604665031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 16604665031 in words is "sixteen billion, six hundred four million, six hundred sixty-five thousand, thirty-one".