261514645352273 has 2 divisors, whose sum is σ = 261514645352274. Its totient is φ = 261514645352272.

The previous prime is 261514645352183. The next prime is 261514645352287. The reversal of 261514645352273 is 372253546415162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159519754392769 + 101994890959504 = 12630113^2 + 10099252^2 .

It is a cyclic number.

It is not a de Polignac number, because 261514645352273 - 2¹⁶ = 261514645286737 is a prime.

It is not a weakly prime, because it can be changed into another prime (261514645352293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130757322676136 + 130757322676137.

It is an arithmetic number, because the mean of its divisors is an integer number (130757322676137).

Almost surely, 2^{261514645352273} is an apocalyptic number.

It is an amenable number.

261514645352273 is a deficient number, since it is larger than the sum of its proper divisors (1).

261514645352273 is an equidigital number, since it uses as much as digits as its factorization.

261514645352273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288000, while the sum is 56.

The spelling of 261514645352273 in words is "two hundred sixty-one trillion, five hundred fourteen billion, six hundred forty-five million, three hundred fifty-two thousand, two hundred seventy-three".