261421771036003 has 2 divisors, whose sum is σ = 261421771036004. Its totient is φ = 261421771036002.

The previous prime is 261421771035949. The next prime is 261421771036037. The reversal of 261421771036003 is 300630177124162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261421771036003 is a prime.

It is not a weakly prime, because it can be changed into another prime (261421771036043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130710885518001 + 130710885518002.

It is an arithmetic number, because the mean of its divisors is an integer number (130710885518002).

Almost surely, 2^{261421771036003} is an apocalyptic number.

261421771036003 is a deficient number, since it is larger than the sum of its proper divisors (1).

261421771036003 is an equidigital number, since it uses as much as digits as its factorization.

261421771036003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 261421771036003 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, seven hundred seventy-one million, thirty-six thousand, three".