78971589058 has 4 divisors (see below), whose sum is σ = 118457383590. Its totient is φ = 39485794528.

The previous prime is 78971589041. The next prime is 78971589181. The reversal of 78971589058 is 85098517987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47775904929 + 31195684129 = 218577^2 + 176623^2 .

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 78971588984 and 78971589002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19742897263 + ... + 19742897266.

Almost surely, 2^78971589058 is an apocalyptic number.

78971589058 is a deficient number, since it is larger than the sum of its proper divisors (39485794532).

78971589058 is a wasteful number, since it uses less digits than its factorization.

78971589058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39485794531.

The product of its (nonzero) digits is 50803200, while the sum is 67.

The spelling of 78971589058 in words is "seventy-eight billion, nine hundred seventy-one million, five hundred eighty-nine thousand, fifty-eight".