857668837284 has 72 divisors (see below), whose sum is σ = 2569477030848. Its totient is φ = 245048237280.

The previous prime is 857668837279. The next prime is 857668837313. The reversal of 857668837284 is 482738866758.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63020007 + ... + 63033614.

It is an arithmetic number, because the mean of its divisors is an integer number (35687180984).

Almost surely, 2^857668837284 is an apocalyptic number.

857668837284 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

857668837284 is an abundant number, since it is smaller than the sum of its proper divisors (1711808193564).

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

857668837284 is a wasteful number, since it uses less digits than its factorization.

857668837284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126053647 (or 126053633 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 72.

The spelling of 857668837284 in words is "eight hundred fifty-seven billion, six hundred sixty-eight million, eight hundred thirty-seven thousand, two hundred eighty-four".