25475857452 has 96 divisors (see below), whose sum is σ = 66749679360. Its totient is φ = 8402279040.

The previous prime is 25475857439. The next prime is 25475857453.

It is a happy number.

25475857452 is a `hidden beast` number, since 2 + 5 + 4 + 7 + 585 + 7 + 4 + 52 = 666.

25475857452 is nontrivially palindromic in base 10.

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

It is not an unprimeable number, because it can be changed into a prime (25475857453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4098627 + ... + 4104837.

It is an arithmetic number, because the mean of its divisors is an integer number (695309160).

Almost surely, 2^25475857452 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 25475857452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33374839680).

25475857452 is an abundant number, since it is smaller than the sum of its proper divisors (41273821908).

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

25475857452 is a wasteful number, since it uses less digits than its factorization.

25475857452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620 (or 6612 counting only the distinct ones).

The product of its digits is 15680000, while the sum is 54.

The spelling of 25475857452 in words is "twenty-five billion, four hundred seventy-five million, eight hundred fifty-seven thousand, four hundred fifty-two".