65631102120 has 192 divisors, whose sum is σ = 224318989440. Its totient is φ = 17254944000.

The previous prime is 65631102091. The next prime is 65631102157. The reversal of 65631102120 is 2120113656.

65631102120 is a `hidden beast` number, since 6 + 5 + 631 + 1 + 0 + 2 + 1 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 642570 + ... + 737670.

It is an arithmetic number, because the mean of its divisors is an integer number (1168328070).

Almost surely, 2^65631102120 is an apocalyptic number.

65631102120 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 65631102120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112159494720).

65631102120 is an abundant number, since it is smaller than the sum of its proper divisors (158687887320).

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

65631102120 is a wasteful number, since it uses less digits than its factorization.

65631102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95198 (or 95182 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 65631102120 its reverse (2120113656), we get a palindrome (67751215776).

The spelling of 65631102120 in words is "sixty-five billion, six hundred thirty-one million, one hundred two thousand, one hundred twenty".