851012068 has 6 divisors (see below), whose sum is σ = 1489271126. Its totient is φ = 425506032.

The previous prime is 851012051. The next prime is 851012069. The reversal of 851012068 is 860210158.

It can be written as a sum of positive squares in only one way, i.e., 850422244 + 589824 = 29162^2 + 768^2 .

It is not an unprimeable number, because it can be changed into a prime (851012069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106376505 + ... + 106376512.

Almost surely, 2^851012068 is an apocalyptic number.

It is an amenable number.

851012068 is a deficient number, since it is larger than the sum of its proper divisors (638259058).

851012068 is a wasteful number, since it uses less digits than its factorization.

851012068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212753021 (or 212753019 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 851012068 is about 29172.1111337524. Note that the first 4 decimals coincide. The cubic root of 851012068 is about 947.6440488031.

The spelling of 851012068 in words is "eight hundred fifty-one million, twelve thousand, sixty-eight".