71823765036420 has 144 divisors (see below), whose sum is σ = 227023118627760. Its totient is φ = 18357573255168.

The previous prime is 71823765036337. The next prime is 71823765036421. The reversal of 71823765036420 is 2463056732817.

It is a happy number.

71823765036420 is a `hidden beast` number, since 7 + 1 + 8 + 2 + 3 + 76 + 503 + 64 + 2 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4855042069056 + 66968722967364 = 2203416^2 + 8183442^2 .

It is not an unprimeable number, because it can be changed into a prime (71823765036421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49501437 + ... + 50931716.

It is an arithmetic number, because the mean of its divisors is an integer number (1576549434915).

Almost surely, 2^{71823765036420} is an apocalyptic number.

It is an amenable number.

71823765036420 is an abundant number, since it is smaller than the sum of its proper divisors (155199353591340).

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

71823765036420 is a wasteful number, since it uses less digits than its factorization.

71823765036420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100433334 (or 100433329 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 71823765036420 in words is "seventy-one trillion, eight hundred twenty-three billion, seven hundred sixty-five million, thirty-six thousand, four hundred twenty".