851964220799 has 8 divisors (see below), whose sum is σ = 852743996160. Its totient is φ = 851184806400.

The previous prime is 851964220787. The next prime is 851964220829. The reversal of 851964220799 is 997022469158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851964220799 - 2⁸ = 851964220543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851964220729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4750439 + ... + 4926519.

It is an arithmetic number, because the mean of its divisors is an integer number (106592999520).

Almost surely, 2^851964220799 is an apocalyptic number.

851964220799 is a deficient number, since it is larger than the sum of its proper divisors (779775361).

851964220799 is a wasteful number, since it uses less digits than its factorization.

851964220799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180481.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 851964220799 in words is "eight hundred fifty-one billion, nine hundred sixty-four million, two hundred twenty thousand, seven hundred ninety-nine".