261030855500 has 48 divisors (see below), whose sum is σ = 570147125184. Its totient is φ = 104402134400.

The previous prime is 261030855469. The next prime is 261030855521. The reversal of 261030855500 is 5558030162.

261030855500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 7058057 + ... + 7094943.

It is an arithmetic number, because the mean of its divisors is an integer number (11878065108).

Almost surely, 2^261030855500 is an apocalyptic number.

261030855500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261030855500 is an abundant number, since it is smaller than the sum of its proper divisors (309116269684).

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

261030855500 is a wasteful number, since it uses less digits than its factorization.

261030855500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51059 (or 51047 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 261030855500 its reverse (5558030162), we get a palindrome (266588885662).

The spelling of 261030855500 in words is "two hundred sixty-one billion, thirty million, eight hundred fifty-five thousand, five hundred".