65817649480 has 256 divisors, whose sum is σ = 177829344000. Its totient is φ = 21641625600.

The previous prime is 65817649421. The next prime is 65817649481. The reversal of 65817649480 is 8494671856.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (65817649481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52277091 + ... + 52278349.

It is an arithmetic number, because the mean of its divisors is an integer number (694645875).

Almost surely, 2^65817649480 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 65817649480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88914672000).

65817649480 is an abundant number, since it is smaller than the sum of its proper divisors (112011694520).

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

65817649480 is a wasteful number, since it uses less digits than its factorization.

65817649480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 65817649480 in words is "sixty-five billion, eight hundred seventeen million, six hundred forty-nine thousand, four hundred eighty".