851577061 has 2 divisors, whose sum is σ = 851577062. Its totient is φ = 851577060.

The previous prime is 851577049. The next prime is 851577109. The reversal of 851577061 is 160775158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738154561 + 113422500 = 27169^2 + 10650^2 .

It is a cyclic number.

It is not a de Polignac number, because 851577061 - 2⁹ = 851576549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851577361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425788530 + 425788531.

It is an arithmetic number, because the mean of its divisors is an integer number (425788531).

Almost surely, 2^851577061 is an apocalyptic number.

It is an amenable number.

851577061 is a deficient number, since it is larger than the sum of its proper divisors (1).

851577061 is an equidigital number, since it uses as much as digits as its factorization.

851577061 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 851577061 is about 29181.7933136399. The cubic root of 851577061 is about 947.8537182974.

The spelling of 851577061 in words is "eight hundred fifty-one million, five hundred seventy-seven thousand, sixty-one".