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28133538611 = 61977472063
BaseRepresentation
bin11010001100111000…
…111011101100110011
32200121200012211200112
4122030320323230303
5430104141213421
620531355211535
72014114063313
oct321470735463
980550184615
1028133538611
1110a27715a62
125551a46bab
1328647a5089
14150c5d1443
15ae9d4345b
hex68ce3bb33

28133538611 has 8 divisors (see below), whose sum is σ = 28624072704. Its totient is φ = 27643950720.

The previous prime is 28133538607. The next prime is 28133538617. The reversal of 28133538611 is 11683533182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28133538611 - 22 = 28133538607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28133538617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176435 + ... + 295628.

It is an arithmetic number, because the mean of its divisors is an integer number (3578009088).

Almost surely, 228133538611 is an apocalyptic number.

28133538611 is a deficient number, since it is larger than the sum of its proper divisors (490534093).

28133538611 is an equidigital number, since it uses as much as digits as its factorization.

28133538611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473101.

The product of its digits is 103680, while the sum is 41.

The spelling of 28133538611 in words is "twenty-eight billion, one hundred thirty-three million, five hundred thirty-eight thousand, six hundred eleven".

Divisors: 1 61 977 59597 472063 28795843 461205551 28133538611