851441378 has 18 divisors (see below), whose sum is σ = 1307893131. Its totient is φ = 415713684.

The previous prime is 851441369. The next prime is 851441389. The reversal of 851441378 is 873144158.

It can be written as a sum of positive squares in only one way, i.e., 425720689 + 425720689 = 20633^2 + 20633^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20633.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1939283 + ... + 1939721.

Almost surely, 2^851441378 is an apocalyptic number.

851441378 is a deficient number, since it is larger than the sum of its proper divisors (456451753).

851441378 is an frugal number, since it uses more digits than its factorization.

851441378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 488 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 851441378 is about 29179.4684324441. The cubic root of 851441378 is about 947.8033746574.

The spelling of 851441378 in words is "eight hundred fifty-one million, four hundred forty-one thousand, three hundred seventy-eight".