425565398784 has 144 divisors (see below), whose sum is σ = 1207303725600. Its totient is φ = 132614062080.

The previous prime is 425565398773. The next prime is 425565398789. The reversal of 425565398784 is 487893565524.

It is a super-2 number, since 2×425565398784² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425565398789) 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, 1835964 + ... + 2054724.

It is an arithmetic number, because the mean of its divisors is an integer number (8384053650).

Almost surely, 2^425565398784 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 425565398784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603651862800).

425565398784 is an abundant number, since it is smaller than the sum of its proper divisors (781738326816).

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

425565398784 is a wasteful number, since it uses less digits than its factorization.

425565398784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218946 (or 218932 counting only the distinct ones).

The product of its digits is 290304000, while the sum is 66.

The spelling of 425565398784 in words is "four hundred twenty-five billion, five hundred sixty-five million, three hundred ninety-eight thousand, seven hundred eighty-four".