71865544823 has 2 divisors, whose sum is σ = 71865544824. Its totient is φ = 71865544822.

The previous prime is 71865544783. The next prime is 71865544837. The reversal of 71865544823 is 32844556817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71865544823 - 2⁸ = 71865544567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71865544853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35932772411 + 35932772412.

It is an arithmetic number, because the mean of its divisors is an integer number (35932772412).

Almost surely, 2^71865544823 is an apocalyptic number.

71865544823 is a deficient number, since it is larger than the sum of its proper divisors (1).

71865544823 is an equidigital number, since it uses as much as digits as its factorization.

71865544823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6451200, while the sum is 53.

The spelling of 71865544823 in words is "seventy-one billion, eight hundred sixty-five million, five hundred forty-four thousand, eight hundred twenty-three".