851751767091 has 16 divisors (see below), whose sum is σ = 1202551488000. Its totient is φ = 534397634688.

The previous prime is 851751767059. The next prime is 851751767281. The reversal of 851751767091 is 190767157158.

It is not a de Polignac number, because 851751767091 - 2⁵ = 851751767059 is a prime.

It is a super-4 number, since 4×851751767091⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (851751767051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256810 + ... + 1330208.

It is an arithmetic number, because the mean of its divisors is an integer number (75159468000).

Almost surely, 2^851751767091 is an apocalyptic number.

851751767091 is a deficient number, since it is larger than the sum of its proper divisors (350799720909).

851751767091 is a wasteful number, since it uses less digits than its factorization.

851751767091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088978.

The product of its (nonzero) digits is 3704400, while the sum is 57.

The spelling of 851751767091 in words is "eight hundred fifty-one billion, seven hundred fifty-one million, seven hundred sixty-seven thousand, ninety-one".