71580142858 has 24 divisors (see below), whose sum is σ = 124912087524. Its totient is φ = 30674246400.

The previous prime is 71580142853. The next prime is 71580142859. The reversal of 71580142858 is 85824108517.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68030723929 + 3549418929 = 260827^2 + 59577^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (71580142853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1209928 + ... + 1267708.

Almost surely, 2^71580142858 is an apocalyptic number.

71580142858 is a deficient number, since it is larger than the sum of its proper divisors (53331944666).

71580142858 is a wasteful number, since it uses less digits than its factorization.

71580142858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70438 (or 70431 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 49.

The spelling of 71580142858 in words is "seventy-one billion, five hundred eighty million, one hundred forty-two thousand, eight hundred fifty-eight".