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25998920010 = 23257139359827
BaseRepresentation
bin11000001101101010…
…000000100101001010
32111002220112222110100
4120031222000211022
5411221210420020
615535503030230
71610164113420
oct301552004512
974086488410
1025998920010
1110031792458
125056b9b376
1325b4485c4b
141388cd3110
15a2273da90
hex60da8094a

25998920010 has 192 divisors, whose sum is σ = 78120806400. Its totient is φ = 5876309376.

The previous prime is 25998919963. The next prime is 25998920011. The reversal of 25998920010 is 1002989952.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (25998920011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31437217 + ... + 31438043.

It is an arithmetic number, because the mean of its divisors is an integer number (406879200).

Almost surely, 225998920010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25998920010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39060403200).

25998920010 is an abundant number, since it is smaller than the sum of its proper divisors (52121886390).

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

25998920010 is a wasteful number, since it uses less digits than its factorization.

25998920010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 25998920010 in words is "twenty-five billion, nine hundred ninety-eight million, nine hundred twenty thousand, ten".