261075166116 has 48 divisors (see below), whose sum is σ = 622869717120. Its totient is φ = 85085809920.

The previous prime is 261075166111. The next prime is 261075166133. The reversal of 261075166116 is 611661570162.

It is a happy number.

261075166116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261075166111) by changing a digit.

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, 945601 + ... + 1190088.

It is an arithmetic number, because the mean of its divisors is an integer number (12976452440).

Almost surely, 2^261075166116 is an apocalyptic number.

It is an amenable number.

261075166116 is an abundant number, since it is smaller than the sum of its proper divisors (361794551004).

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

261075166116 is a wasteful number, since it uses less digits than its factorization.

261075166116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135924 (or 2135922 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 261075166116 in words is "two hundred sixty-one billion, seventy-five million, one hundred sixty-six thousand, one hundred sixteen".