25591819552 has 96 divisors (see below), whose sum is σ = 55620782784. Its totient is φ = 11518848000.

The previous prime is 25591819543. The next prime is 25591819597.

25591819552 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 25591819552.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2810527 + ... + 2819617.

It is an arithmetic number, because the mean of its divisors is an integer number (579383154).

Almost surely, 2^25591819552 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 25591819552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27810391392).

25591819552 is an abundant number, since it is smaller than the sum of its proper divisors (30028963232).

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

25591819552 is a wasteful number, since it uses less digits than its factorization.

25591819552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9282 (or 9274 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 52.

Adding to 25591819552 its product of digits (1620000), we get a palindrome (25593439552).

The spelling of 25591819552 in words is "twenty-five billion, five hundred ninety-one million, eight hundred nineteen thousand, five hundred fifty-two".