261040237147 has 2 divisors, whose sum is σ = 261040237148. Its totient is φ = 261040237146.

The previous prime is 261040237097. The next prime is 261040237219. The reversal of 261040237147 is 741732040162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261040237147 is a prime.

It is not a weakly prime, because it can be changed into another prime (261040231147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130520118573 + 130520118574.

It is an arithmetic number, because the mean of its divisors is an integer number (130520118574).

Almost surely, 2^261040237147 is an apocalyptic number.

261040237147 is a deficient number, since it is larger than the sum of its proper divisors (1).

261040237147 is an equidigital number, since it uses as much as digits as its factorization.

261040237147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 261040237147 in words is "two hundred sixty-one billion, forty million, two hundred thirty-seven thousand, one hundred forty-seven".