71109278041 has 2 divisors, whose sum is σ = 71109278042. Its totient is φ = 71109278040.

The previous prime is 71109278033. The next prime is 71109278057. The reversal of 71109278041 is 14087290117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66471668041 + 4637610000 = 257821^2 + 68100^2 .

It is a cyclic number.

It is not a de Polignac number, because 71109278041 - 2³ = 71109278033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71109277985 and 71109278003.

It is not a weakly prime, because it can be changed into another prime (71109276041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35554639020 + 35554639021.

It is an arithmetic number, because the mean of its divisors is an integer number (35554639021).

Almost surely, 2^71109278041 is an apocalyptic number.

It is an amenable number.

71109278041 is a deficient number, since it is larger than the sum of its proper divisors (1).

71109278041 is an equidigital number, since it uses as much as digits as its factorization.

71109278041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 71109278041 in words is "seventy-one billion, one hundred nine million, two hundred seventy-eight thousand, forty-one".