71909537013389 has 2 divisors, whose sum is σ = 71909537013390. Its totient is φ = 71909537013388.

The previous prime is 71909537013373. The next prime is 71909537013401. The reversal of 71909537013389 is 98331073590917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50636502460489 + 21273034552900 = 7115933^2 + 4612270^2 .

It is a cyclic number.

It is not a de Polignac number, because 71909537013389 - 2⁴ = 71909537013373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71909537013329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35954768506694 + 35954768506695.

It is an arithmetic number, because the mean of its divisors is an integer number (35954768506695).

Almost surely, 2^{71909537013389} is an apocalyptic number.

It is an amenable number.

71909537013389 is a deficient number, since it is larger than the sum of its proper divisors (1).

71909537013389 is an equidigital number, since it uses as much as digits as its factorization.

71909537013389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38578680, while the sum is 65.

The spelling of 71909537013389 in words is "seventy-one trillion, nine hundred nine billion, five hundred thirty-seven million, thirteen thousand, three hundred eighty-nine".