261362056027 has 2 divisors, whose sum is σ = 261362056028. Its totient is φ = 261362056026.

The previous prime is 261362055961. The next prime is 261362056121. The reversal of 261362056027 is 720650263162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261362056027 is a prime.

It is not a weakly prime, because it can be changed into another prime (261362056327) 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, 130681028013 + 130681028014.

It is an arithmetic number, because the mean of its divisors is an integer number (130681028014).

Almost surely, 2^261362056027 is an apocalyptic number.

261362056027 is a deficient number, since it is larger than the sum of its proper divisors (1).

261362056027 is an equidigital number, since it uses as much as digits as its factorization.

261362056027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 261362056027 in words is "two hundred sixty-one billion, three hundred sixty-two million, fifty-six thousand, twenty-seven".