25530041550 has 192 divisors, whose sum is σ = 73219313664. Its totient is φ = 5830809600.

The previous prime is 25530041527. The next prime is 25530041597. The reversal of 25530041550 is 5514003552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2348227 + ... + 2359073.

It is an arithmetic number, because the mean of its divisors is an integer number (381350592).

Almost surely, 2^25530041550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25530041550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36609656832).

25530041550 is an abundant number, since it is smaller than the sum of its proper divisors (47689272114).

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

25530041550 is a wasteful number, since it uses less digits than its factorization.

25530041550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10963 (or 10958 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 25530041550 in words is "twenty-five billion, five hundred thirty million, forty-one thousand, five hundred fifty".