261723226455677 has 16 divisors (see below), whose sum is σ = 306611949335040. Its totient is φ = 218744913706368.

The previous prime is 261723226455673. The next prime is 261723226455683. The reversal of 261723226455677 is 776554622327162.

It is not a de Polignac number, because 261723226455677 - 2² = 261723226455673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261723226455673) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1478557088 + ... + 1478734089.

It is an arithmetic number, because the mean of its divisors is an integer number (19163246833440).

Almost surely, 2^{261723226455677} is an apocalyptic number.

It is an amenable number.

261723226455677 is a deficient number, since it is larger than the sum of its proper divisors (44888722879363).

261723226455677 is a wasteful number, since it uses less digits than its factorization.

261723226455677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957291500.

The product of its digits is 355622400, while the sum is 65.

The spelling of 261723226455677 in words is "two hundred sixty-one trillion, seven hundred twenty-three billion, two hundred twenty-six million, four hundred fifty-five thousand, six hundred seventy-seven".