65199936120 has 256 divisors, whose sum is σ = 226897459200. Its totient is φ = 14812815360.

The previous prime is 65199936119. The next prime is 65199936143. The reversal of 65199936120 is 2163999156.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 63 ways as a sum of consecutive naturals, for example, 5357082 + ... + 5369238.

It is an arithmetic number, because the mean of its divisors is an integer number (886318200).

Almost surely, 2^65199936120 is an apocalyptic number.

65199936120 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 65199936120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113448729600).

65199936120 is an abundant number, since it is smaller than the sum of its proper divisors (161697523080).

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

65199936120 is a wasteful number, since it uses less digits than its factorization.

65199936120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438 (or 12434 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 51.

The spelling of 65199936120 in words is "sixty-five billion, one hundred ninety-nine million, nine hundred thirty-six thousand, one hundred twenty".