25030005500 has 48 divisors (see below), whose sum is σ = 54730550784. Its totient is φ = 10000094400.

The previous prime is 25030005487. The next prime is 25030005503. The reversal of 25030005500 is 550003052.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25030005503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397157 + ... + 455843.

It is an arithmetic number, because the mean of its divisors is an integer number (1140219808).

Almost surely, 2^25030005500 is an apocalyptic number.

25030005500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25030005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27365275392).

25030005500 is an abundant number, since it is smaller than the sum of its proper divisors (29700545284).

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

25030005500 is a wasteful number, since it uses less digits than its factorization.

25030005500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59559 (or 59547 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

Adding to 25030005500 its reverse (550003052), we get a palindrome (25580008552).

The spelling of 25030005500 in words is "twenty-five billion, thirty million, five thousand, five hundred".