851874368556 has 24 divisors (see below), whose sum is σ = 1987722782640. Its totient is φ = 283955848192.

The previous prime is 851874368551. The next prime is 851874368581. The reversal of 851874368556 is 655863478158.

851874368556 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (851874368551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028880 + ... + 2412488.

It is an arithmetic number, because the mean of its divisors is an integer number (82821782610).

Almost surely, 2^851874368556 is an apocalyptic number.

It is an amenable number.

851874368556 is an abundant number, since it is smaller than the sum of its proper divisors (1135848414084).

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

851874368556 is a wasteful number, since it uses less digits than its factorization.

851874368556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568673 (or 568671 counting only the distinct ones).

The product of its digits is 193536000, while the sum is 66.

The spelling of 851874368556 in words is "eight hundred fifty-one billion, eight hundred seventy-four million, three hundred sixty-eight thousand, five hundred fifty-six".