25331145665430 has 128 divisors (see below), whose sum is σ = 66983285394432. Its totient is φ = 6079620800000.

The previous prime is 25331145665381. The next prime is 25331145665447. The reversal of 25331145665430 is 3456654113352.

It is a self number, because there is not a number n which added to its sum of digits gives 25331145665430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 675280375 + ... + 675317885.

It is an arithmetic number, because the mean of its divisors is an integer number (523306917144).

Almost surely, 2^{25331145665430} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25331145665430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33491642697216).

25331145665430 is an abundant number, since it is smaller than the sum of its proper divisors (41652139729002).

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

25331145665430 is a wasteful number, since it uses less digits than its factorization.

25331145665430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57894.

The product of its (nonzero) digits is 3888000, while the sum is 48.

Adding to 25331145665430 its reverse (3456654113352), we get a palindrome (28787799778782).

The spelling of 25331145665430 in words is "twenty-five trillion, three hundred thirty-one billion, one hundred forty-five million, six hundred sixty-five thousand, four hundred thirty".