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13568782501 is a prime number
BaseRepresentation
bin11001010001100001…
…10011000010100101
31022000122001120101001
430220300303002211
5210242102020001
610122230033301
7660150514441
oct145060630245
938018046331
1013568782501
11583325113a
1227681a8831
13138318a3b1
1492a107821
15546355001
hex328c330a5

13568782501 has 2 divisors, whose sum is σ = 13568782502. Its totient is φ = 13568782500.

The previous prime is 13568782499. The next prime is 13568782529. The reversal of 13568782501 is 10528786531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8100180001 + 5468602500 = 90001^2 + 73950^2 .

It is a cyclic number.

It is not a de Polignac number, because 13568782501 - 21 = 13568782499 is a prime.

It is a super-2 number, since 2×135687825012 (a number of 21 digits) contains 22 as substring.

Together with 13568782499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13568782571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6784391250 + 6784391251.

It is an arithmetic number, because the mean of its divisors is an integer number (6784391251).

Almost surely, 213568782501 is an apocalyptic number.

It is an amenable number.

13568782501 is a deficient number, since it is larger than the sum of its proper divisors (1).

13568782501 is an equidigital number, since it uses as much as digits as its factorization.

13568782501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 13568782501 in words is "thirteen billion, five hundred sixty-eight million, seven hundred eighty-two thousand, five hundred one".