855651547520 has 384 divisors, whose sum is σ = 2616400465920. Its totient is φ = 264583065600.

The previous prime is 855651547481. The next prime is 855651547567. The reversal of 855651547520 is 25745156558.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43800155 + ... + 43819685.

It is an arithmetic number, because the mean of its divisors is an integer number (6813542880).

Almost surely, 2^855651547520 is an apocalyptic number.

855651547520 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 855651547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308200232960).

855651547520 is an abundant number, since it is smaller than the sum of its proper divisors (1760748918400).

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

855651547520 is a wasteful number, since it uses less digits than its factorization.

855651547520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19702 (or 19683 counting only the distinct ones).

The product of its (nonzero) digits is 8400000, while the sum is 53.

The spelling of 855651547520 in words is "eight hundred fifty-five billion, six hundred fifty-one million, five hundred forty-seven thousand, five hundred twenty".