851776416 has 72 divisors (see below), whose sum is σ = 2425088484. Its totient is φ = 283591680.

The previous prime is 851776391. The next prime is 851776417. The reversal of 851776416 is 614677158.

It can be written as a sum of positive squares in 2 ways, for example, as 751856400 + 99920016 = 27420^2 + 9996^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (851776417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425530 + ... + 427526.

Almost surely, 2^851776416 is an apocalyptic number.

It is an amenable number.

851776416 is an abundant number, since it is smaller than the sum of its proper divisors (1573312068).

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

851776416 is a wasteful number, since it uses less digits than its factorization.

851776416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494 (or 3483 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 851776416 is about 29185.2088565424. The cubic root of 851776416 is about 947.9276770121.

The spelling of 851776416 in words is "eight hundred fifty-one million, seven hundred seventy-six thousand, four hundred sixteen".