425120516040 has 128 divisors (see below), whose sum is σ = 1391656464000. Its totient is φ = 103033374720.

The previous prime is 425120516039. The next prime is 425120516069. The reversal of 425120516040 is 40615021524.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 425120515989 and 425120516007.

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 31 ways as a sum of consecutive naturals, for example, 5443186 + ... + 5520734.

It is an arithmetic number, because the mean of its divisors is an integer number (10872316125).

Almost surely, 2^425120516040 is an apocalyptic number.

425120516040 is a gapful number since it is divisible by the number (40) 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 425120516040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695828232000).

425120516040 is an abundant number, since it is smaller than the sum of its proper divisors (966535947960).

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

425120516040 is a wasteful number, since it uses less digits than its factorization.

425120516040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81727 (or 81723 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 425120516040 its reverse (40615021524), we get a palindrome (465735537564).

The spelling of 425120516040 in words is "four hundred twenty-five billion, one hundred twenty million, five hundred sixteen thousand, forty".