65945542080 has 504 divisors, whose sum is σ = 236057535504. Its totient is φ = 15585771520.

The previous prime is 65945542079. The next prime is 65945542093. The reversal of 65945542080 is 8024554956.

65945542080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 256597312 + ... + 256597568.

It is an arithmetic number, because the mean of its divisors is an integer number (468368126).

Almost surely, 2^65945542080 is an apocalyptic number.

65945542080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65945542080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118028767752).

65945542080 is an abundant number, since it is smaller than the sum of its proper divisors (170111993424).

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

65945542080 is a wasteful number, since it uses less digits than its factorization.

65945542080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 65945542080 in words is "sixty-five billion, nine hundred forty-five million, five hundred forty-two thousand, eighty".