851365561250 has 80 divisors (see below), whose sum is σ = 1692618063840. Its totient is φ = 320158800000.

The previous prime is 851365561247. The next prime is 851365561271. The reversal of 851365561250 is 52165563158.

It is a junction number, because it is equal to n+sod(n) for n = 851365561195 and 851365561204.

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 39 ways as a sum of consecutive naturals, for example, 2974430 + ... + 3248070.

It is an arithmetic number, because the mean of its divisors is an integer number (21157725798).

Almost surely, 2^851365561250 is an apocalyptic number.

851365561250 is a deficient number, since it is larger than the sum of its proper divisors (841252502590).

851365561250 is a wasteful number, since it uses less digits than its factorization.

851365561250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273813 (or 273798 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 47.

The spelling of 851365561250 in words is "eight hundred fifty-one billion, three hundred sixty-five million, five hundred sixty-one thousand, two hundred fifty".