857784656622 has 16 divisors (see below), whose sum is σ = 1716483331152. Its totient is φ = 285775882560.

The previous prime is 857784656621. The next prime is 857784656671. The reversal of 857784656622 is 226656487758.

It is a super-2 number, since 2×857784656622² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857784656621) 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, 38071879 + ... + 38094402.

It is an arithmetic number, because the mean of its divisors is an integer number (107280208197).

Almost surely, 2^857784656622 is an apocalyptic number.

857784656622 is an abundant number, since it is smaller than the sum of its proper divisors (858698674530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857784656622 is a wasteful number, since it uses less digits than its factorization.

857784656622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76168163.

The product of its digits is 270950400, while the sum is 66.

The spelling of 857784656622 in words is "eight hundred fifty-seven billion, seven hundred eighty-four million, six hundred fifty-six thousand, six hundred twenty-two".