851420577 has 16 divisors (see below), whose sum is σ = 1305671552. Its totient is φ = 483425280.

The previous prime is 851420551. The next prime is 851420587. The reversal of 851420577 is 775024158.

It is not a de Polignac number, because 851420577 - 2⁸ = 851420321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851420587) 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, 125824 + ... + 132417.

It is an arithmetic number, because the mean of its divisors is an integer number (81604472).

Almost surely, 2^851420577 is an apocalyptic number.

It is an amenable number.

851420577 is a deficient number, since it is larger than the sum of its proper divisors (454250975).

851420577 is a wasteful number, since it uses less digits than its factorization.

851420577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258408.

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 851420577 is about 29179.1119981400. Note that the first 3 decimals coincide. The cubic root of 851420577 is about 947.7956562092.

The spelling of 851420577 in words is "eight hundred fifty-one million, four hundred twenty thousand, five hundred seventy-seven".