65099738880 has 864 divisors, whose sum is σ = 260346078720. Its totient is φ = 15440855040.

The previous prime is 65099738807. The next prime is 65099738917. The reversal of 65099738880 is 8883799056.

65099738880 is a `hidden beast` number, since 6 + 509 + 97 + 38 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 181336141 + ... + 181336499.

It is an arithmetic number, because the mean of its divisors is an integer number (301326480).

Almost surely, 2^65099738880 is an apocalyptic number.

65099738880 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 65099738880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130173039360).

65099738880 is an abundant number, since it is smaller than the sum of its proper divisors (195246339840).

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

65099738880 is a wasteful number, since it uses less digits than its factorization.

65099738880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 65099738880 in words is "sixty-five billion, ninety-nine million, seven hundred thirty-eight thousand, eight hundred eighty".