851978151 has 12 divisors (see below), whose sum is σ = 1245463128. Its totient is φ = 561141744.

The previous prime is 851978147. The next prime is 851978159. The reversal of 851978151 is 151879158.

851978151 is a `hidden beast` number, since 8 + 519 + 7 + 81 + 51 = 666.

851978151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 851978151 - 2² = 851978147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851978097 and 851978106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851978159) 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, 569520 + ... + 571013.

It is an arithmetic number, because the mean of its divisors is an integer number (103788594).

Almost surely, 2^851978151 is an apocalyptic number.

851978151 is a deficient number, since it is larger than the sum of its proper divisors (393484977).

851978151 is a wasteful number, since it uses less digits than its factorization.

851978151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140622 (or 1140619 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The square root of 851978151 is about 29188.6647690503. The cubic root of 851978151 is about 948.0025069367.

The spelling of 851978151 in words is "eight hundred fifty-one million, nine hundred seventy-eight thousand, one hundred fifty-one".