71455709389 has 16 divisors (see below), whose sum is σ = 72198347760. Its totient is φ = 70718054400.

The previous prime is 71455709383. The next prime is 71455709401. The reversal of 71455709389 is 98390755417.

It can be written as a sum of positive squares in 8 ways, for example, as 26786886889 + 44668822500 = 163667^2 + 211350^2 .

It is a cyclic number.

It is not a de Polignac number, because 71455709389 - 2⁷ = 71455709261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71455709383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34204657 + ... + 34206745.

It is an arithmetic number, because the mean of its divisors is an integer number (4512396735).

Almost surely, 2^71455709389 is an apocalyptic number.

It is an amenable number.

71455709389 is a deficient number, since it is larger than the sum of its proper divisors (742638371).

71455709389 is a wasteful number, since it uses less digits than its factorization.

71455709389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 71455709389 in words is "seventy-one billion, four hundred fifty-five million, seven hundred nine thousand, three hundred eighty-nine".