842505426819840 has 576 divisors, whose sum is σ = 3113159612774400. Its totient is φ = 190206225285120.

The previous prime is 842505426819829. The next prime is 842505426819841. The reversal of 842505426819840 is 48918624505248.

It is not an unprimeable number, because it can be changed into a prime (842505426819841) 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, 732254610 + ... + 733404270.

It is an arithmetic number, because the mean of its divisors is an integer number (5404790994400).

Almost surely, 2^{842505426819840} is an apocalyptic number.

842505426819840 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 842505426819840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556579806387200).

842505426819840 is an abundant number, since it is smaller than the sum of its proper divisors (2270654185954560).

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

842505426819840 is a wasteful number, since it uses less digits than its factorization.

842505426819840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150028 (or 1150014 counting only the distinct ones).

The product of its (nonzero) digits is 176947200, while the sum is 66.

The spelling of 842505426819840 in words is "eight hundred forty-two trillion, five hundred five billion, four hundred twenty-six million, eight hundred nineteen thousand, eight hundred forty".