855466015440 has 320 divisors, whose sum is σ = 2931139180800. Its totient is φ = 205475512320.

The previous prime is 855466015373. The next prime is 855466015441. The reversal of 855466015440 is 44510664558.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 855466015440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855466015441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9162111 + ... + 9255009.

It is an arithmetic number, because the mean of its divisors is an integer number (9159809940).

Almost surely, 2^855466015440 is an apocalyptic number.

855466015440 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 855466015440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465569590400).

855466015440 is an abundant number, since it is smaller than the sum of its proper divisors (2075673165360).

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

855466015440 is a wasteful number, since it uses less digits than its factorization.

855466015440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93030 (or 93024 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 48.

Adding to 855466015440 its reverse (44510664558), we get a palindrome (899976679998).

The spelling of 855466015440 in words is "eight hundred fifty-five billion, four hundred sixty-six million, fifteen thousand, four hundred forty".