851998909344 has 384 divisors, whose sum is σ = 2573739463680. Its totient is φ = 244397260800.

The previous prime is 851998909337. The next prime is 851998909361. The reversal of 851998909344 is 443909899158.

851998909344 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 an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 494484867 + ... + 494486589.

It is an arithmetic number, because the mean of its divisors is an integer number (6702446520).

Almost surely, 2^851998909344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851998909344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286869731840).

851998909344 is an abundant number, since it is smaller than the sum of its proper divisors (1721740554336).

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

851998909344 is a wasteful number, since it uses less digits than its factorization.

851998909344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 69.

The spelling of 851998909344 in words is "eight hundred fifty-one billion, nine hundred ninety-eight million, nine hundred nine thousand, three hundred forty-four".