981574971071 has 4 divisors (see below), whose sum is σ = 981579427752. Its totient is φ = 981570514392.

The previous prime is 981574971053. The next prime is 981574971079. The reversal of 981574971071 is 170179475189.

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

It is a cyclic number.

It is not a de Polignac number, because 981574971071 - 2³⁰ = 980501229247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 981574971071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981574971079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1879796 + ... + 2344521.

It is an arithmetic number, because the mean of its divisors is an integer number (245394856938).

Almost surely, 2^981574971071 is an apocalyptic number.

981574971071 is a deficient number, since it is larger than the sum of its proper divisors (4456681).

981574971071 is a wasteful number, since it uses less digits than its factorization.

981574971071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456680.

The product of its (nonzero) digits is 4445280, while the sum is 59.

The spelling of 981574971071 in words is "nine hundred eighty-one billion, five hundred seventy-four million, nine hundred seventy-one thousand, seventy-one".