260724172535861 has 2 divisors, whose sum is σ = 260724172535862. Its totient is φ = 260724172535860.

The previous prime is 260724172535843. The next prime is 260724172535881. The reversal of 260724172535861 is 168535271427062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137232204598225 + 123491967937636 = 11714615^2 + 11112694^2 .

It is a cyclic number.

It is not a de Polignac number, because 260724172535861 - 2¹⁴ = 260724172519477 is a prime.

It is a super-2 number, since 2×260724172535861² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 260724172535861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260724172535881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130362086267930 + 130362086267931.

It is an arithmetic number, because the mean of its divisors is an integer number (130362086267931).

Almost surely, 2^{260724172535861} is an apocalyptic number.

It is an amenable number.

260724172535861 is a deficient number, since it is larger than the sum of its proper divisors (1).

260724172535861 is an equidigital number, since it uses as much as digits as its factorization.

260724172535861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33868800, while the sum is 59.

The spelling of 260724172535861 in words is "two hundred sixty trillion, seven hundred twenty-four billion, one hundred seventy-two million, five hundred thirty-five thousand, eight hundred sixty-one".