25514552140 has 192 divisors, whose sum is σ = 68153057280. Its totient is φ = 7793418240.

The previous prime is 25514552071. The next prime is 25514552143. The reversal of 25514552140 is 4125541552.

It is a junction number, because it is equal to n+sod(n) for n = 25514552096 and 25514552105.

It is not an unprimeable number, because it can be changed into a prime (25514552143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16281637 + ... + 16283203.

It is an arithmetic number, because the mean of its divisors is an integer number (354963840).

Almost surely, 2^25514552140 is an apocalyptic number.

25514552140 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 25514552140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34076528640).

25514552140 is an abundant number, since it is smaller than the sum of its proper divisors (42638505140).

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

25514552140 is a wasteful number, since it uses less digits than its factorization.

25514552140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 25514552140 in words is "twenty-five billion, five hundred fourteen million, five hundred fifty-two thousand, one hundred forty".