51072266720 has 24 divisors (see below), whose sum is σ = 120658230504. Its totient is φ = 20428906624.

The previous prime is 51072266689. The next prime is 51072266723. The reversal of 51072266720 is 2766227015.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072266723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 159600674 + ... + 159600993.

It is an arithmetic number, because the mean of its divisors is an integer number (5027426271).

Almost surely, 2^51072266720 is an apocalyptic number.

It is an amenable number.

51072266720 is an abundant number, since it is smaller than the sum of its proper divisors (69585963784).

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

51072266720 is a wasteful number, since it uses less digits than its factorization.

51072266720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319201682 (or 319201674 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 51072266720 in words is "fifty-one billion, seventy-two million, two hundred sixty-six thousand, seven hundred twenty".