25528422383640 has 2560 divisors, whose sum is σ = 105906350499840. Its totient is φ = 5442851635200.

The previous prime is 25528422383627. The next prime is 25528422383671. The reversal of 25528422383640 is 4638322482552.

It is a happy number.

25528422383640 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 8 + 42 + 238 + 364 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 68440810494 + ... + 68440810866.

It is an arithmetic number, because the mean of its divisors is an integer number (41369668164).

Almost surely, 2^{25528422383640} is an apocalyptic number.

25528422383640 is a gapful number since it is divisible by the number (20) 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 25528422383640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52953175249920).

25528422383640 is an abundant number, since it is smaller than the sum of its proper divisors (80377928116200).

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

25528422383640 is a wasteful number, since it uses less digits than its factorization.

25528422383640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 54.

The spelling of 25528422383640 in words is "twenty-five trillion, five hundred twenty-eight billion, four hundred twenty-two million, three hundred eighty-three thousand, six hundred forty".