71353044643 has 4 divisors (see below), whose sum is σ = 71357097448. Its totient is φ = 71348991840.

The previous prime is 71353044617. The next prime is 71353044709. The reversal of 71353044643 is 34644035317.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71353044643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71353044596 and 71353044605.

It is not an unprimeable number, because it can be changed into a prime (71353044613) 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, 1999878 + ... + 2035243.

It is an arithmetic number, because the mean of its divisors is an integer number (17839274362).

Almost surely, 2^71353044643 is an apocalyptic number.

71353044643 is a deficient number, since it is larger than the sum of its proper divisors (4052805).

71353044643 is a wasteful number, since it uses less digits than its factorization.

71353044643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052804.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 71353044643 in words is "seventy-one billion, three hundred fifty-three million, forty-four thousand, six hundred forty-three".