25530280550550 has 72 divisors (see below), whose sum is σ = 71573586546384. Its totient is φ = 6512071558080.

The previous prime is 25530280550549. The next prime is 25530280550591. The reversal of 25530280550550 is 5505508203552.

25530280550550 is a `hidden beast` number, since 25 + 5 + 3 + 0 + 28 + 0 + 5 + 50 + 550 = 666.

It is a super-2 number, since 2×25530280550550² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 25530280550496 and 25530280550505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1233336537 + ... + 1233357236.

It is an arithmetic number, because the mean of its divisors is an integer number (994077590922).

Almost surely, 2^{25530280550550} is an apocalyptic number.

25530280550550 is an abundant number, since it is smaller than the sum of its proper divisors (46043305995834).

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

25530280550550 is a wasteful number, since it uses less digits than its factorization.

25530280550550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466693814 (or 2466693806 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 45.

The spelling of 25530280550550 in words is "twenty-five trillion, five hundred thirty billion, two hundred eighty million, five hundred fifty thousand, five hundred fifty".