71580078658 has 24 divisors (see below), whose sum is σ = 118032124140. Its totient is φ = 32532614400.

The previous prime is 71580078653. The next prime is 71580078673. The reversal of 71580078658 is 85687008517.

It can be written as a sum of positive squares in 2 ways, for example, as 71466932889 + 113145769 = 267333^2 + 10637^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71580078599 and 71580078608.

It is not an unprimeable number, because it can be changed into a prime (71580078653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4039578 + ... + 4057258.

Almost surely, 2^71580078658 is an apocalyptic number.

71580078658 is a deficient number, since it is larger than the sum of its proper divisors (46452045482).

71580078658 is a wasteful number, since it uses less digits than its factorization.

71580078658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34434 (or 34423 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 55.

The spelling of 71580078658 in words is "seventy-one billion, five hundred eighty million, seventy-eight thousand, six hundred fifty-eight".