425555840240 has 20 divisors (see below), whose sum is σ = 989417328744. Its totient is φ = 170222336064.

The previous prime is 425555840167. The next prime is 425555840249. The reversal of 425555840240 is 42048555524.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 425555840191 and 425555840200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425555840249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2659723922 + ... + 2659724081.

Almost surely, 2^425555840240 is an apocalyptic number.

425555840240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

425555840240 is an abundant number, since it is smaller than the sum of its proper divisors (563861488504).

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

425555840240 is a wasteful number, since it uses less digits than its factorization.

425555840240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319448016 (or 5319448010 counting only the distinct ones).

The product of its (nonzero) digits is 1280000, while the sum is 44.

The spelling of 425555840240 in words is "four hundred twenty-five billion, five hundred fifty-five million, eight hundred forty thousand, two hundred forty".