851579660086 has 4 divisors (see below), whose sum is σ = 1277369490132. Its totient is φ = 425789830042.

The previous prime is 851579660081. The next prime is 851579660089. The reversal of 851579660086 is 680066975158.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851579660081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212894915020 + ... + 212894915023.

It is an arithmetic number, because the mean of its divisors is an integer number (319342372533).

Almost surely, 2^851579660086 is an apocalyptic number.

851579660086 is a deficient number, since it is larger than the sum of its proper divisors (425789830046).

851579660086 is a wasteful number, since it uses less digits than its factorization.

851579660086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425789830045.

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 851579660086 in words is "eight hundred fifty-one billion, five hundred seventy-nine million, six hundred sixty thousand, eighty-six".