851223115850 has 24 divisors (see below), whose sum is σ = 1603316458560. Its totient is φ = 336179254320.

The previous prime is 851223115843. The next prime is 851223115877. The reversal of 851223115850 is 58511322158.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 851223115798 and 851223115807.

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 11 ways as a sum of consecutive naturals, for example, 107745812 + ... + 107753711.

It is an arithmetic number, because the mean of its divisors is an integer number (66804852440).

Almost surely, 2^851223115850 is an apocalyptic number.

851223115850 is a deficient number, since it is larger than the sum of its proper divisors (752093342710).

851223115850 is a wasteful number, since it uses less digits than its factorization.

851223115850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215499614 (or 215499609 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 41.

The spelling of 851223115850 in words is "eight hundred fifty-one billion, two hundred twenty-three million, one hundred fifteen thousand, eight hundred fifty".