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BaseRepresentation
bin1011100111011101111011…
…10110001101110101110001
310100110010000202101100021022
411303232331312031311301
511322013342014144401
6130155212510105225
75244406504025033
oct563567566156561
9110403022340238
1025545355615601
1181597a7308328
122a46a3baab215
131133bbbca8123
1464458a7c5c53
152e475ee7171b
hex173bbdd8dd71

25545355615601 has 2 divisors, whose sum is σ = 25545355615602. Its totient is φ = 25545355615600.

The previous prime is 25545355615583. The next prime is 25545355615621. The reversal of 25545355615601 is 10651655354552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22879241400625 + 2666114214976 = 4783225^2 + 1632824^2 .

It is a cyclic number.

It is not a de Polignac number, because 25545355615601 - 210 = 25545355614577 is a prime.

It is not a weakly prime, because it can be changed into another prime (25545355615621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772677807800 + 12772677807801.

It is an arithmetic number, because the mean of its divisors is an integer number (12772677807801).

Almost surely, 225545355615601 is an apocalyptic number.

It is an amenable number.

25545355615601 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545355615601 is an equidigital number, since it uses as much as digits as its factorization.

25545355615601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500000, while the sum is 53.

The spelling of 25545355615601 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred fifteen thousand, six hundred one".