71258706478 has 4 divisors (see below), whose sum is σ = 106888059720. Its totient is φ = 35629353238.

The previous prime is 71258706473. The next prime is 71258706517. The reversal of 71258706478 is 87460785217.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71258706473) 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 as a sum of consecutive naturals, namely, 17814676618 + ... + 17814676621.

It is an arithmetic number, because the mean of its divisors is an integer number (26722014930).

Almost surely, 2^71258706478 is an apocalyptic number.

71258706478 is a deficient number, since it is larger than the sum of its proper divisors (35629353242).

71258706478 is a wasteful number, since it uses less digits than its factorization.

71258706478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35629353241.

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 71258706478 in words is "seventy-one billion, two hundred fifty-eight million, seven hundred six thousand, four hundred seventy-eight".