71057047643 has 4 divisors (see below), whose sum is σ = 72790146408. Its totient is φ = 69323948880.

The previous prime is 71057047631. The next prime is 71057047657. The reversal of 71057047643 is 34674075017.

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 71057047643 - 2³² = 66762080347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71057047594 and 71057047603.

It is not an unprimeable number, because it can be changed into a prime (71057047693) 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, 866549321 + ... + 866549402.

It is an arithmetic number, because the mean of its divisors is an integer number (18197536602).

Almost surely, 2^71057047643 is an apocalyptic number.

71057047643 is a deficient number, since it is larger than the sum of its proper divisors (1733098765).

71057047643 is a wasteful number, since it uses less digits than its factorization.

71057047643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733098764.

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 71057047643 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, six hundred forty-three".