851161751 has 4 divisors (see below), whose sum is σ = 928540104. Its totient is φ = 773783400.

The previous prime is 851161741. The next prime is 851161771. The reversal of 851161751 is 157161158.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 851161751 - 2²² = 846967447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851161741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38689160 + ... + 38689181.

It is an arithmetic number, because the mean of its divisors is an integer number (232135026).

Almost surely, 2^851161751 is an apocalyptic number.

851161751 is a deficient number, since it is larger than the sum of its proper divisors (77378353).

851161751 is a wasteful number, since it uses less digits than its factorization.

851161751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77378352.

The product of its digits is 8400, while the sum is 35.

The square root of 851161751 is about 29174.6765363388. The cubic root of 851161751 is about 947.6996053551.

The spelling of 851161751 in words is "eight hundred fifty-one million, one hundred sixty-one thousand, seven hundred fifty-one".