71309858813 has 8 divisors (see below), whose sum is σ = 72806764800. Its totient is φ = 69827008608.

The previous prime is 71309858791. The next prime is 71309858827. The reversal of 71309858813 is 31885890317.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71309858813 - 2²⁴ = 71293081597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71309857813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3503693 + ... + 3523986.

It is an arithmetic number, because the mean of its divisors is an integer number (9100845600).

Almost surely, 2^71309858813 is an apocalyptic number.

71309858813 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

71309858813 is a deficient number, since it is larger than the sum of its proper divisors (1496905987).

71309858813 is a wasteful number, since it uses less digits than its factorization.

71309858813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027891.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 71309858813 in words is "seventy-one billion, three hundred nine million, eight hundred fifty-eight thousand, eight hundred thirteen".