25530163560 has 192 divisors, whose sum is σ = 90648305280. Its totient is φ = 6180088320.

The previous prime is 25530163517. The next prime is 25530163591. The reversal of 25530163560 is 6536103552.

25530163560 is a `hidden beast` number, since 2 + 5 + 5 + 30 + 1 + 63 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 2937942 + ... + 2946618.

It is an arithmetic number, because the mean of its divisors is an integer number (472126590).

Almost surely, 2^25530163560 is an apocalyptic number.

25530163560 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 25530163560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45324152640).

25530163560 is an abundant number, since it is smaller than the sum of its proper divisors (65118141720).

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

25530163560 is a wasteful number, since it uses less digits than its factorization.

25530163560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448 (or 9441 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 25530163560 in words is "twenty-five billion, five hundred thirty million, one hundred sixty-three thousand, five hundred sixty".