51065066160 has 120 divisors (see below), whose sum is σ = 171586909104. Its totient is φ = 13609935360.

The previous prime is 51065066147. The next prime is 51065066161. The reversal of 51065066160 is 6166056015.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (51065066161) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1373415 + ... + 1410105.

Almost surely, 2^51065066160 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 51065066160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85793454552).

51065066160 is an abundant number, since it is smaller than the sum of its proper divisors (120521842944).

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

51065066160 is a wasteful number, since it uses less digits than its factorization.

51065066160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38643 (or 38634 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 51065066160 in words is "fifty-one billion, sixty-five million, sixty-six thousand, one hundred sixty".