71152643385 has 48 divisors (see below), whose sum is σ = 125075338128. Its totient is φ = 37411891200.

The previous prime is 71152643377. The next prime is 71152643399. The reversal of 71152643385 is 58334625117.

It is a happy number.

71152643385 is a `hidden beast` number, since 7 + 1 + 1 + 5 + 264 + 3 + 385 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 309900816 + 70842742569 = 17604^2 + 266163^2 .

It is not a de Polignac number, because 71152643385 - 2³ = 71152643377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 71152643385.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12746295 + ... + 12751875.

It is an arithmetic number, because the mean of its divisors is an integer number (2605736211).

Almost surely, 2^71152643385 is an apocalyptic number.

It is an amenable number.

71152643385 is a deficient number, since it is larger than the sum of its proper divisors (53922694743).

71152643385 is a wasteful number, since it uses less digits than its factorization.

71152643385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9546 (or 9543 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 71152643385 in words is "seventy-one billion, one hundred fifty-two million, six hundred forty-three thousand, three hundred eighty-five".