25228722036 has 96 divisors (see below), whose sum is σ = 68314337280. Its totient is φ = 7097359104.

The previous prime is 25228721989. The next prime is 25228722059. The reversal of 25228722036 is 63022782252.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25228721985 and 25228722003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3964225 + ... + 3970583.

It is an arithmetic number, because the mean of its divisors is an integer number (711607680).

Almost surely, 2^25228722036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25228722036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34157168640).

25228722036 is an abundant number, since it is smaller than the sum of its proper divisors (43085615244).

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

25228722036 is a wasteful number, since it uses less digits than its factorization.

25228722036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7093 (or 7091 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 25228722036 in words is "twenty-five billion, two hundred twenty-eight million, seven hundred twenty-two thousand, thirty-six".