261800233590056 has 64 divisors (see below), whose sum is σ = 564027357888000. Its totient is φ = 111595861278720.

The previous prime is 261800233590053. The next prime is 261800233590107. The reversal of 261800233590056 is 650095332008162.

It is a junction number, because it is equal to n+sod(n) for n = 261800233589986 and 261800233590013.

It is not an unprimeable number, because it can be changed into a prime (261800233590053) 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, 702425 + ... + 22893096.

It is an arithmetic number, because the mean of its divisors is an integer number (8812927467000).

Almost surely, 2^{261800233590056} is an apocalyptic number.

It is an amenable number.

261800233590056 is an abundant number, since it is smaller than the sum of its proper divisors (302227124297944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261800233590056 is a wasteful number, since it uses less digits than its factorization.

261800233590056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23596602 (or 23596598 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 261800233590056 in words is "two hundred sixty-one trillion, eight hundred billion, two hundred thirty-three million, five hundred ninety thousand, fifty-six".