25398000056 has 192 divisors, whose sum is σ = 60164778240. Its totient is φ = 9939072000.

The previous prime is 25398000049. The next prime is 25398000073. The reversal of 25398000056 is 65000089352.

It is a junction number, because it is equal to n+sod(n) for n = 25397999983 and 25398000019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14023391 + ... + 14025201.

It is an arithmetic number, because the mean of its divisors is an integer number (313358220).

Almost surely, 2^25398000056 is an apocalyptic number.

25398000056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a pronic number, being equal to 159367×159368.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25398000056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30082389120).

25398000056 is an abundant number, since it is smaller than the sum of its proper divisors (34766778184).

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

25398000056 is a wasteful number, since it uses less digits than its factorization.

25398000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 25398000056 in words is "twenty-five billion, three hundred ninety-eight million, fifty-six", and thus it is an aban number.