857445942808 has 288 divisors, whose sum is σ = 2172097198800. Its totient is φ = 315268402176.

The previous prime is 857445942797. The next prime is 857445942811. The reversal of 857445942808 is 808249544758.

It is a self number, because there is not a number n which added to its sum of digits gives 857445942808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 66705310 + ... + 66718162.

Almost surely, 2^857445942808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857445942808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086048599400).

857445942808 is an abundant number, since it is smaller than the sum of its proper divisors (1314651255992).

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

857445942808 is a wasteful number, since it uses less digits than its factorization.

857445942808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12971 (or 12947 counting only the distinct ones).

The product of its (nonzero) digits is 103219200, while the sum is 64.

It can be divided in two parts, 857445 and 942808, that added together give a triangular number (1800253 = T₁₈₉₇).

The spelling of 857445942808 in words is "eight hundred fifty-seven billion, four hundred forty-five million, nine hundred forty-two thousand, eight hundred eight".