261675142113397 has 2 divisors, whose sum is σ = 261675142113398. Its totient is φ = 261675142113396.

The previous prime is 261675142113373. The next prime is 261675142113487. The reversal of 261675142113397 is 793311241576162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221940601224241 + 39734540889156 = 14897671^2 + 6303534^2 .

It is a cyclic number.

It is not a de Polignac number, because 261675142113397 - 2²⁷ = 261675007895669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261675142113317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130837571056698 + 130837571056699.

It is an arithmetic number, because the mean of its divisors is an integer number (130837571056699).

Almost surely, 2^{261675142113397} is an apocalyptic number.

It is an amenable number.

261675142113397 is a deficient number, since it is larger than the sum of its proper divisors (1).

261675142113397 is an equidigital number, since it uses as much as digits as its factorization.

261675142113397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 58.

The spelling of 261675142113397 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, one hundred forty-two million, one hundred thirteen thousand, three hundred ninety-seven".