65099988800 has 1008 divisors, whose sum is σ = 222972782400. Its totient is φ = 18424627200.

The previous prime is 65099988797. The next prime is 65099988827. The reversal of 65099988800 is 888999056.

It is a happy number.

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 143 ways as a sum of consecutive naturals, for example, 475182332 + ... + 475182468.

Almost surely, 2^65099988800 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 65099988800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111486391200).

65099988800 is an abundant number, since it is smaller than the sum of its proper divisors (157872793600).

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

65099988800 is a wasteful number, since it uses less digits than its factorization.

65099988800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 65099988800 in words is "sixty-five billion, ninety-nine million, nine hundred eighty-eight thousand, eight hundred".