71099755409 has 2 divisors, whose sum is σ = 71099755410. Its totient is φ = 71099755408.

The previous prime is 71099755379. The next prime is 71099755411. The reversal of 71099755409 is 90455799017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64248054784 + 6851700625 = 253472^2 + 82775^2 .

It is a cyclic number.

It is not a de Polignac number, because 71099755409 - 2²⁸ = 70831319953 is a prime.

Together with 71099755411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71099754409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35549877704 + 35549877705.

It is an arithmetic number, because the mean of its divisors is an integer number (35549877705).

Almost surely, 2^71099755409 is an apocalyptic number.

It is an amenable number.

71099755409 is a deficient number, since it is larger than the sum of its proper divisors (1).

71099755409 is an equidigital number, since it uses as much as digits as its factorization.

71099755409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3572100, while the sum is 56.

The spelling of 71099755409 in words is "seventy-one billion, ninety-nine million, seven hundred fifty-five thousand, four hundred nine".