261544475325116 has 12 divisors (see below), whose sum is σ = 457703795969280. Its totient is φ = 130771962191040.

The previous prime is 261544475325101. The next prime is 261544475325127. The reversal of 261544475325116 is 611523574445162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66724220 + ... + 70535171.

It is an arithmetic number, because the mean of its divisors is an integer number (38141982997440).

Almost surely, 2^{261544475325116} is an apocalyptic number.

It is an amenable number.

261544475325116 is a deficient number, since it is larger than the sum of its proper divisors (196159320644164).

261544475325116 is a wasteful number, since it uses less digits than its factorization.

261544475325116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137735764 (or 137735762 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 56.

The spelling of 261544475325116 in words is "two hundred sixty-one trillion, five hundred forty-four billion, four hundred seventy-five million, three hundred twenty-five thousand, one hundred sixteen".