16601615903 has 2 divisors, whose sum is σ = 16601615904. Its totient is φ = 16601615902.

The previous prime is 16601615867. The next prime is 16601615917. The reversal of 16601615903 is 30951610661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16601615903 - 2²⁸ = 16333180447 is a prime.

It is a super-2 number, since 2×16601615903² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16601615963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300807951 + 8300807952.

It is an arithmetic number, because the mean of its divisors is an integer number (8300807952).

Almost surely, 2^16601615903 is an apocalyptic number.

16601615903 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601615903 is an equidigital number, since it uses as much as digits as its factorization.

16601615903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 16601615903 in words is "sixteen billion, six hundred one million, six hundred fifteen thousand, nine hundred three".