42718150261 has 2 divisors, whose sum is σ = 42718150262. Its totient is φ = 42718150260.

The previous prime is 42718150259. The next prime is 42718150271. The reversal of 42718150261 is 16205181724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41769140625 + 949009636 = 204375^2 + 30806^2 .

It is a cyclic number.

It is not a de Polignac number, because 42718150261 - 2¹ = 42718150259 is a prime.

Together with 42718150259, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42718150261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42718150201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21359075130 + 21359075131.

It is an arithmetic number, because the mean of its divisors is an integer number (21359075131).

Almost surely, 2^42718150261 is an apocalyptic number.

It is an amenable number.

42718150261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42718150261 is an equidigital number, since it uses as much as digits as its factorization.

42718150261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 42718150261 in words is "forty-two billion, seven hundred eighteen million, one hundred fifty thousand, two hundred sixty-one".