71520913241 has 2 divisors, whose sum is σ = 71520913242. Its totient is φ = 71520913240.

The previous prime is 71520913181. The next prime is 71520913259. The reversal of 71520913241 is 14231902517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47522256016 + 23998657225 = 217996^2 + 154915^2 .

It is a cyclic number.

It is not a de Polignac number, because 71520913241 - 2²² = 71516718937 is a prime.

It is not a weakly prime, because it can be changed into another prime (71520915241) 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, 35760456620 + 35760456621.

It is an arithmetic number, because the mean of its divisors is an integer number (35760456621).

Almost surely, 2^71520913241 is an apocalyptic number.

It is an amenable number.

71520913241 is a deficient number, since it is larger than the sum of its proper divisors (1).

71520913241 is an equidigital number, since it uses as much as digits as its factorization.

71520913241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 71520913241 in words is "seventy-one billion, five hundred twenty million, nine hundred thirteen thousand, two hundred forty-one".