65545001280 has 448 divisors, whose sum is σ = 260397711360. Its totient is φ = 15376435200.

The previous prime is 65545001227. The next prime is 65545001297. The reversal of 65545001280 is 8210054556.

65545001280 is a `hidden beast` number, since 65 + 5 + 4 + 500 + 12 + 80 = 666.

It is a super-2 number, since 2×65545001280² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2935117 + ... + 2957363.

Almost surely, 2^65545001280 is an apocalyptic number.

65545001280 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 65545001280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130198855680).

65545001280 is an abundant number, since it is smaller than the sum of its proper divisors (194852710080).

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

65545001280 is a wasteful number, since it uses less digits than its factorization.

65545001280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315 (or 22299 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 65545001280 in words is "sixty-five billion, five hundred forty-five million, one thousand, two hundred eighty".