261674360177137 has 2 divisors, whose sum is σ = 261674360177138. Its totient is φ = 261674360177136.

The previous prime is 261674360177081. The next prime is 261674360177201. The reversal of 261674360177137 is 731771063476162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251858677443136 + 9815682734001 = 15870056^2 + 3132999^2 .

It is a cyclic number.

It is not a de Polignac number, because 261674360177137 - 2²⁷ = 261674225959409 is a prime.

It is a super-2 number, since 2×261674360177137² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261674360177437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130837180088568 + 130837180088569.

It is an arithmetic number, because the mean of its divisors is an integer number (130837180088569).

Almost surely, 2^{261674360177137} is an apocalyptic number.

It is an amenable number.

261674360177137 is a deficient number, since it is larger than the sum of its proper divisors (1).

261674360177137 is an equidigital number, since it uses as much as digits as its factorization.

261674360177137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37340352, while the sum is 61.

The spelling of 261674360177137 in words is "two hundred sixty-one trillion, six hundred seventy-four billion, three hundred sixty million, one hundred seventy-seven thousand, one hundred thirty-seven".