261084820648 has 32 divisors (see below), whose sum is σ = 513461836800. Its totient is φ = 124311799872.

The previous prime is 261084820639. The next prime is 261084820673. The reversal of 261084820648 is 846028480162.

261084820648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9369528 + ... + 9397351.

It is an arithmetic number, because the mean of its divisors is an integer number (16045682400).

Almost surely, 2^261084820648 is an apocalyptic number.

It is an amenable number.

261084820648 is a deficient number, since it is larger than the sum of its proper divisors (252377016152).

261084820648 is a wasteful number, since it uses less digits than its factorization.

261084820648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18766969 (or 18766965 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 49.

The spelling of 261084820648 in words is "two hundred sixty-one billion, eighty-four million, eight hundred twenty thousand, six hundred forty-eight".