25320112512 has 128 divisors (see below), whose sum is σ = 69668121600. Its totient is φ = 8138188800.

The previous prime is 25320112501. The next prime is 25320112547. The reversal of 25320112512 is 21521102352.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×25320112512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16157553 + ... + 16159119.

It is an arithmetic number, because the mean of its divisors is an integer number (544282200).

Almost surely, 2^25320112512 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 25320112512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34834060800).

25320112512 is an abundant number, since it is smaller than the sum of its proper divisors (44348009088).

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

25320112512 is a wasteful number, since it uses less digits than its factorization.

25320112512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3052 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 25320112512 its reverse (21521102352), we get a palindrome (46841214864).

The spelling of 25320112512 in words is "twenty-five billion, three hundred twenty million, one hundred twelve thousand, five hundred twelve".