65788471656 has 96 divisors (see below), whose sum is σ = 180585849600. Its totient is φ = 21633505920.

The previous prime is 65788471643. The next prime is 65788471667. The reversal of 65788471656 is 65617488756.

65788471656 is a `hidden beast` number, since 6 + 578 + 8 + 4 + 7 + 1 + 6 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 65788471593 and 65788471602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7771266 + ... + 7779726.

It is an arithmetic number, because the mean of its divisors is an integer number (1881102600).

Almost surely, 2^65788471656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65788471656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90292924800).

65788471656 is an abundant number, since it is smaller than the sum of its proper divisors (114797377944).

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

65788471656 is a wasteful number, since it uses less digits than its factorization.

65788471656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9919 (or 9912 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 65788471656 in words is "sixty-five billion, seven hundred eighty-eight million, four hundred seventy-one thousand, six hundred fifty-six".