851881011 has 8 divisors (see below), whose sum is σ = 1136945040. Its totient is φ = 567368832.

The previous prime is 851880989. The next prime is 851881013. The reversal of 851881011 is 110188158.

851881011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 851881011 - 2¹⁵ = 851848243 is a prime.

It is a super-3 number, since 3×851881011³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (851881013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134346 + ... + 140543.

It is an arithmetic number, because the mean of its divisors is an integer number (142118130).

Almost surely, 2^851881011 is an apocalyptic number.

851881011 is a deficient number, since it is larger than the sum of its proper divisors (285064029).

851881011 is a wasteful number, since it uses less digits than its factorization.

851881011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275925.

The product of its (nonzero) digits is 2560, while the sum is 33.

The square root of 851881011 is about 29187.0007194984. Note that the first 3 decimals coincide. The cubic root of 851881011 is about 947.9664760974.

The spelling of 851881011 in words is "eight hundred fifty-one million, eight hundred eighty-one thousand, eleven".