25503450090 has 128 divisors (see below), whose sum is σ = 62997419520. Its totient is φ = 6605918208.

The previous prime is 25503450079. The next prime is 25503450097. The reversal of 25503450090 is 9005430552.

It is not an unprimeable number, because it can be changed into a prime (25503450097) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50104756 + ... + 50105264.

It is an arithmetic number, because the mean of its divisors is an integer number (492167340).

Almost surely, 2^25503450090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25503450090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31498709760).

25503450090 is an abundant number, since it is smaller than the sum of its proper divisors (37493969430).

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

25503450090 is a wasteful number, since it uses less digits than its factorization.

25503450090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 25503450090 in words is "twenty-five billion, five hundred three million, four hundred fifty thousand, ninety".