25520110452440 has 128 divisors (see below), whose sum is σ = 57981656174400. Its totient is φ = 10108857231360.

The previous prime is 25520110452409. The next prime is 25520110452457. The reversal of 25520110452440 is 4425401102552.

25520110452440 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 25520110452440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1403660150 + ... + 1403678330.

Almost surely, 2^{25520110452440} is an apocalyptic number.

25520110452440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25520110452440 is an abundant number, since it is smaller than the sum of its proper divisors (32461545721960).

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

25520110452440 is a wasteful number, since it uses less digits than its factorization.

25520110452440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19237 (or 19233 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 25520110452440 its reverse (4425401102552), we get a palindrome (29945511554992).

The spelling of 25520110452440 in words is "twenty-five trillion, five hundred twenty billion, one hundred ten million, four hundred fifty-two thousand, four hundred forty".