25502430828 has 108 divisors (see below), whose sum is σ = 70953126216. Its totient is φ = 7108416000.

The previous prime is 25502430823. The next prime is 25502430859. The reversal of 25502430828 is 82803420552.

It is not an unprimeable number, because it can be changed into a prime (25502430823) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 975528 + ... + 1001328.

Almost surely, 2^25502430828 is an apocalyptic number.

25502430828 is a gapful number since it is divisible by the number (28) 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 25502430828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35476563108).

25502430828 is an abundant number, since it is smaller than the sum of its proper divisors (45450695388).

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

25502430828 is a wasteful number, since it uses less digits than its factorization.

25502430828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25904 (or 25854 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 25502430828 in words is "twenty-five billion, five hundred two million, four hundred thirty thousand, eight hundred twenty-eight".