120571866856 has 24 divisors (see below), whose sum is σ = 262982006370. Its totient is φ = 51673657056.

The previous prime is 120571866809. The next prime is 120571866859. The reversal of 120571866856 is 658668175021.

It can be written as a sum of positive squares in only one way, i.e., 110733210756 + 9838656100 = 332766^2 + 99190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 120571866797 and 120571866806.

It is not an unprimeable number, because it can be changed into a prime (120571866859) 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 5 ways as a sum of consecutive naturals, for example, 153790255 + ... + 153791038.

Almost surely, 2^120571866856 is an apocalyptic number.

It is an amenable number.

120571866856 is an abundant number, since it is smaller than the sum of its proper divisors (142410139514).

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

120571866856 is a wasteful number, since it uses less digits than its factorization.

120571866856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307581313 (or 307581302 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 120571866856 in words is "one hundred twenty billion, five hundred seventy-one million, eight hundred sixty-six thousand, eight hundred fifty-six".