261055773 has 24 divisors (see below), whose sum is σ = 429249600. Its totient is φ = 151335360.

The previous prime is 261055771. The next prime is 261055777. The reversal of 261055773 is 377550162.

261055773 is a `hidden beast` number, since 26 + 10 + 557 + 73 = 666.

It is not a de Polignac number, because 261055773 - 2¹ = 261055771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261055771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55048 + ... + 59601.

It is an arithmetic number, because the mean of its divisors is an integer number (17885400).

Almost surely, 2^261055773 is an apocalyptic number.

261055773 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

261055773 is a deficient number, since it is larger than the sum of its proper divisors (168193827).

261055773 is a wasteful number, since it uses less digits than its factorization.

261055773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114689 (or 114686 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 261055773 is about 16157.2204602153. The cubic root of 261055773 is about 639.1131703133.

It can be divided in two parts, 26105 and 5773, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 261055773 in words is "two hundred sixty-one million, fifty-five thousand, seven hundred seventy-three".