261745750077 has 8 divisors (see below), whose sum is σ = 398850666816. Its totient is φ = 149569000032.

The previous prime is 261745750043. The next prime is 261745750099. The reversal of 261745750077 is 770057547162.

261745750077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261745750077 - 2¹⁰ = 261745749053 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261745750477) 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 7 ways as a sum of consecutive naturals, for example, 6232041648 + ... + 6232041689.

It is an arithmetic number, because the mean of its divisors is an integer number (49856333352).

Almost surely, 2^261745750077 is an apocalyptic number.

It is an amenable number.

261745750077 is a deficient number, since it is larger than the sum of its proper divisors (137104916739).

261745750077 is a wasteful number, since it uses less digits than its factorization.

261745750077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12464083347.

The product of its (nonzero) digits is 2881200, while the sum is 51.

The spelling of 261745750077 in words is "two hundred sixty-one billion, seven hundred forty-five million, seven hundred fifty thousand, seventy-seven".