71823536784 has 40 divisors (see below), whose sum is σ = 206160153120. Its totient is φ = 23941178784.

The previous prime is 71823536777. The next prime is 71823536789. The reversal of 71823536784 is 48763532817.

It is a happy number.

71823536784 is a `hidden beast` number, since 7 + 1 + 8 + 23 + 536 + 7 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 71823536784.

It is not an unprimeable number, because it can be changed into a prime (71823536789) 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, 83128662 + ... + 83129525.

It is an arithmetic number, because the mean of its divisors is an integer number (5154003828).

Almost surely, 2^71823536784 is an apocalyptic number.

It is an amenable number.

71823536784 is an abundant number, since it is smaller than the sum of its proper divisors (134336616336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71823536784 is a wasteful number, since it uses less digits than its factorization.

71823536784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166258204 (or 166258192 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 71823536784 in words is "seventy-one billion, eight hundred twenty-three million, five hundred thirty-six thousand, seven hundred eighty-four".