71057047618 has 4 divisors (see below), whose sum is σ = 106585571430. Its totient is φ = 35528523808.

The previous prime is 71057047591. The next prime is 71057047631. The reversal of 71057047618 is 81674075017.

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., 41458253769 + 29598793849 = 203613^2 + 172043^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17764261903 + ... + 17764261906.

Almost surely, 2^71057047618 is an apocalyptic number.

71057047618 is a deficient number, since it is larger than the sum of its proper divisors (35528523812).

71057047618 is a wasteful number, since it uses less digits than its factorization.

71057047618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35528523811.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 71057047618 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, six hundred eighteen".