51201683280 has 160 divisors (see below), whose sum is σ = 192394293120. Its totient is φ = 12412523520.

The previous prime is 51201683237. The next prime is 51201683287. The reversal of 51201683280 is 8238610215.

It is a happy number.

51201683280 is a `hidden beast` number, since 512 + 0 + 1 + 68 + 3 + 2 + 80 = 666.

It is a super-2 number, since 2×51201683280² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201683287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1053717 + ... + 1101236.

It is an arithmetic number, because the mean of its divisors is an integer number (1202464332).

Almost surely, 2^51201683280 is an apocalyptic number.

It is an amenable number.

51201683280 is an abundant number, since it is smaller than the sum of its proper divisors (141192609840).

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

51201683280 is a wasteful number, since it uses less digits than its factorization.

51201683280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154986 (or 2154974 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 51201683280 in words is "fifty-one billion, two hundred one million, six hundred eighty-three thousand, two hundred eighty".