424825640664 has 64 divisors (see below), whose sum is σ = 1091841292800. Its totient is φ = 137645783424.

The previous prime is 424825640651. The next prime is 424825640669. The reversal of 424825640664 is 466046528424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424825640669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670129 + ... + 1139615.

It is an arithmetic number, because the mean of its divisors is an integer number (17060020200).

Almost surely, 2^424825640664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424825640664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545920646400).

424825640664 is an abundant number, since it is smaller than the sum of its proper divisors (667015652136).

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

424825640664 is a wasteful number, since it uses less digits than its factorization.

424825640664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470552 (or 470548 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 51.

The spelling of 424825640664 in words is "four hundred twenty-four billion, eight hundred twenty-five million, six hundred forty thousand, six hundred sixty-four".