65685819456 has 112 divisors (see below), whose sum is σ = 193282702080. Its totient is φ = 21875028480.

The previous prime is 65685819449. The next prime is 65685819457. The reversal of 65685819456 is 65491858656.

It is a happy number.

65685819456 is a `hidden beast` number, since 6 + 5 + 6 + 8 + 581 + 9 + 45 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 65685819393 and 65685819402.

It is not an unprimeable number, because it can be changed into a prime (65685819457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1913161 + ... + 1947191.

Almost surely, 2^65685819456 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 65685819456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96641351040).

65685819456 is an abundant number, since it is smaller than the sum of its proper divisors (127596882624).

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

65685819456 is a wasteful number, since it uses less digits than its factorization.

65685819456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35169 (or 35153 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 63.

The spelling of 65685819456 in words is "sixty-five billion, six hundred eighty-five million, eight hundred nineteen thousand, four hundred fifty-six".