200123411561 has 16 divisors (see below), whose sum is σ = 210380991744. Its totient is φ = 190124008704.

The previous prime is 200123411549. The next prime is 200123411639. The reversal of 200123411561 is 165114321002.

It is a cyclic number.

It is not a de Polignac number, because 200123411561 - 2²² = 200119217257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200123411561.

It is not an unprimeable number, because it can be changed into a prime (200123411531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5252000 + ... + 5289966.

It is an arithmetic number, because the mean of its divisors is an integer number (13148811984).

Almost surely, 2^200123411561 is an apocalyptic number.

It is an amenable number.

200123411561 is a deficient number, since it is larger than the sum of its proper divisors (10257580183).

200123411561 is a wasteful number, since it uses less digits than its factorization.

200123411561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41360.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 200123411561 its reverse (165114321002), we get a palindrome (365237732563).

The spelling of 200123411561 in words is "two hundred billion, one hundred twenty-three million, four hundred eleven thousand, five hundred sixty-one".