424521424640 has 144 divisors (see below), whose sum is σ = 1024556389920. Its totient is φ = 168528691200.

The previous prime is 424521424627. The next prime is 424521424651. The reversal of 424521424640 is 46424125424.

It is a junction number, because it is equal to n+sod(n) for n = 424521424594 and 424521424603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95374415 + ... + 95378865.

It is an arithmetic number, because the mean of its divisors is an integer number (7114974930).

Almost surely, 2^424521424640 is an apocalyptic number.

424521424640 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 424521424640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512278194960).

424521424640 is an abundant number, since it is smaller than the sum of its proper divisors (600034965280).

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

424521424640 is a wasteful number, since it uses less digits than its factorization.

424521424640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018 (or 5004 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 38.

The spelling of 424521424640 in words is "four hundred twenty-four billion, five hundred twenty-one million, four hundred twenty-four thousand, six hundred forty".