851646051 has 12 divisors (see below), whose sum is σ = 1231221160. Its totient is φ = 567272160.

The previous prime is 851646031. The next prime is 851646053. The reversal of 851646051 is 150646158.

851646051 is a `hidden beast` number, since 8 + 5 + 1 + 646 + 0 + 5 + 1 = 666.

It is not a de Polignac number, because 851646051 - 2²¹ = 849548899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 851645997 and 851646015.

It is not an unprimeable number, because it can be changed into a prime (851646053) 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, 29866 + ... + 50943.

Almost surely, 2^851646051 is an apocalyptic number.

851646051 is a deficient number, since it is larger than the sum of its proper divisors (379575109).

851646051 is a wasteful number, since it uses less digits than its factorization.

851646051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81986 (or 81983 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 851646051 is about 29182.9753623581. The cubic root of 851646051 is about 947.8793142046.

The spelling of 851646051 in words is "eight hundred fifty-one million, six hundred forty-six thousand, fifty-one".