851057761 has 2 divisors, whose sum is σ = 851057762. Its totient is φ = 851057760.

The previous prime is 851057749. The next prime is 851057771. The reversal of 851057761 is 167750158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506250000 + 344807761 = 22500^2 + 18569^2 .

It is a cyclic number.

It is not a de Polignac number, because 851057761 - 2²⁹ = 314186849 is a prime.

It is not a weakly prime, because it can be changed into another prime (851057771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425528880 + 425528881.

It is an arithmetic number, because the mean of its divisors is an integer number (425528881).

Almost surely, 2^851057761 is an apocalyptic number.

It is an amenable number.

851057761 is a deficient number, since it is larger than the sum of its proper divisors (1).

851057761 is an equidigital number, since it uses as much as digits as its factorization.

851057761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 851057761 is about 29172.8942856207. The cubic root of 851057761 is about 947.6610089718.

The spelling of 851057761 in words is "eight hundred fifty-one million, fifty-seven thousand, seven hundred sixty-one".