25530112555440 has 80 divisors (see below), whose sum is σ = 79154200363488. Its totient is φ = 6807096557568.

The previous prime is 25530112555429. The next prime is 25530112555477. The reversal of 25530112555440 is 4455521103552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 25530112555392 and 25530112555401.

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, 5537707 + ... + 9040266.

Almost surely, 2^{25530112555440} is an apocalyptic number.

25530112555440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25530112555440 is an abundant number, since it is smaller than the sum of its proper divisors (53624087808048).

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

25530112555440 is a wasteful number, since it uses less digits than its factorization.

25530112555440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14585286 (or 14585280 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 42.

Adding to 25530112555440 its reverse (4455521103552), we get a palindrome (29985633658992).

The spelling of 25530112555440 in words is "twenty-five trillion, five hundred thirty billion, one hundred twelve million, five hundred fifty-five thousand, four hundred forty".