856953600000 has 288 divisors, whose sum is σ = 2855695817520. Its totient is φ = 228515840000.

The previous prime is 856953599989. The next prime is 856953600037. The reversal of 856953600000 is 6359658.

It is a congruent number.

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, 19177684 + ... + 19222316.

Almost surely, 2^856953600000 is an apocalyptic number.

856953600000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856953600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427847908760).

856953600000 is an abundant number, since it is smaller than the sum of its proper divisors (1998742217520).

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

856953600000 is an frugal number, since it uses more digits than its factorization.

856953600000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44683 (or 44643 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

Adding to 856953600000 its reverse (6359658), we get a palindrome (856959959658).

The spelling of 856953600000 in words is "eight hundred fifty-six billion, nine hundred fifty-three million, six hundred thousand".