71493635843 has 4 divisors (see below), whose sum is σ = 81707012400. Its totient is φ = 61280259288.

The previous prime is 71493635833. The next prime is 71493635923. The reversal of 71493635843 is 34853639417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34853639417 = 577 ⋅60404921.

It is a cyclic number.

It is not a de Polignac number, because 71493635843 - 2¹⁶ = 71493570307 is a prime.

It is a super-2 number, since 2×71493635843² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71493635833) 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, 5106688268 + ... + 5106688281.

It is an arithmetic number, because the mean of its divisors is an integer number (20426753100).

Almost surely, 2^71493635843 is an apocalyptic number.

71493635843 is a deficient number, since it is larger than the sum of its proper divisors (10213376557).

71493635843 is a wasteful number, since it uses less digits than its factorization.

71493635843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10213376556.

The product of its digits is 6531840, while the sum is 53.

The spelling of 71493635843 in words is "seventy-one billion, four hundred ninety-three million, six hundred thirty-five thousand, eight hundred forty-three".