855450794520 has 1344 divisors, whose sum is σ = 3516530760000. Its totient is φ = 187098024960.

The previous prime is 855450794509. The next prime is 855450794521. The reversal of 855450794520 is 25497054558.

855450794520 is a `hidden beast` number, since 8 + 5 + 5 + 45 + 0 + 79 + 4 + 520 = 666.

855450794520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855450794521) by changing a digit.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 9611806636 + ... + 9611806724.

Almost surely, 2^855450794520 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 855450794520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758265380000).

855450794520 is an abundant number, since it is smaller than the sum of its proper divisors (2661079965480).

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

855450794520 is an equidigital number, since it uses as much as digits as its factorization.

855450794520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 10080000, while the sum is 54.

The spelling of 855450794520 in words is "eight hundred fifty-five billion, four hundred fifty million, seven hundred ninety-four thousand, five hundred twenty".