65450810880 has 1920 divisors, whose sum is σ = 308860231680. Its totient is φ = 12421693440.

The previous prime is 65450810879. The next prime is 65450810903. The reversal of 65450810880 is 8801805456.

65450810880 is a `hidden beast` number, since 6 + 54 + 508 + 10 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1234920934 + ... + 1234920986.

It is an arithmetic number, because the mean of its divisors is an integer number (160864704).

Almost surely, 2^65450810880 is an apocalyptic number.

65450810880 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 65450810880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154430115840).

65450810880 is an abundant number, since it is smaller than the sum of its proper divisors (243409420800).

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

65450810880 is a wasteful number, since it uses less digits than its factorization.

65450810880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 65450810880 in words is "sixty-five billion, four hundred fifty million, eight hundred ten thousand, eight hundred eighty".