65859497648 has 80 divisors (see below), whose sum is σ = 148400501760. Its totient is φ = 27728951808.

The previous prime is 65859497647. The next prime is 65859497653. The reversal of 65859497648 is 84679495856.

It is not an unprimeable number, because it can be changed into a prime (65859497647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16167740 + ... + 16171812.

It is an arithmetic number, because the mean of its divisors is an integer number (1855006272).

Almost surely, 2^65859497648 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 65859497648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74200250880).

65859497648 is an abundant number, since it is smaller than the sum of its proper divisors (82541004112).

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

65859497648 is a wasteful number, since it uses less digits than its factorization.

65859497648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6594 (or 6588 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 71.

The spelling of 65859497648 in words is "sixty-five billion, eight hundred fifty-nine million, four hundred ninety-seven thousand, six hundred forty-eight".