200591665123 has 2 divisors, whose sum is σ = 200591665124. Its totient is φ = 200591665122.

The previous prime is 200591665111. The next prime is 200591665207. The reversal of 200591665123 is 321566195002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200591665123 is a prime.

It is a super-2 number, since 2×200591665123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (200591665103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100295832561 + 100295832562.

It is an arithmetic number, because the mean of its divisors is an integer number (100295832562).

Almost surely, 2^200591665123 is an apocalyptic number.

200591665123 is a deficient number, since it is larger than the sum of its proper divisors (1).

200591665123 is an equidigital number, since it uses as much as digits as its factorization.

200591665123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 200591665123 in words is "two hundred billion, five hundred ninety-one million, six hundred sixty-five thousand, one hundred twenty-three".