42471607261 has 2 divisors, whose sum is σ = 42471607262. Its totient is φ = 42471607260.

The previous prime is 42471607223. The next prime is 42471607289. The reversal of 42471607261 is 16270617424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23594496025 + 18877111236 = 153605^2 + 137394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42471607261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42471607201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21235803630 + 21235803631.

It is an arithmetic number, because the mean of its divisors is an integer number (21235803631).

Almost surely, 2^42471607261 is an apocalyptic number.

It is an amenable number.

42471607261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42471607261 is an equidigital number, since it uses as much as digits as its factorization.

42471607261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 42471607261 in words is "forty-two billion, four hundred seventy-one million, six hundred seven thousand, two hundred sixty-one".