851021164448764 has 24 divisors (see below), whose sum is σ = 1502957807027600. Its totient is φ = 421604687560320.

The previous prime is 851021164448759. The next prime is 851021164448797. The reversal of 851021164448764 is 467844461120158.

It is a super-2 number, since 2×851021164448764² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83374432 + ... + 93023320.

Almost surely, 2^{851021164448764} is an apocalyptic number.

It is an amenable number.

851021164448764 is a deficient number, since it is larger than the sum of its proper divisors (651936642578836).

851021164448764 is a wasteful number, since it uses less digits than its factorization.

851021164448764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9851293 (or 9851291 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 61.

The spelling of 851021164448764 in words is "eight hundred fifty-one trillion, twenty-one billion, one hundred sixty-four million, four hundred forty-eight thousand, seven hundred sixty-four".