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71690238671 = 174217072863
BaseRepresentation
bin100001011000100010…
…0100011101011001111
320212001012211110102212
41002301010203223033
52133310200114141
652533430341035
75115356655122
oct1026104435317
9225035743385
1071690238671
11284492a8437
1211a88aba77b
1369b6686b8c
1436812ba3b9
151ce8bd72eb
hex10b1123acf

71690238671 has 4 divisors (see below), whose sum is σ = 75907311552. Its totient is φ = 67473165792.

The previous prime is 71690238667. The next prime is 71690238691. The reversal of 71690238671 is 17683209617.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71690238671 - 22 = 71690238667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71690238661) 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 3 ways as a sum of consecutive naturals, for example, 2108536415 + ... + 2108536448.

It is an arithmetic number, because the mean of its divisors is an integer number (18976827888).

Almost surely, 271690238671 is an apocalyptic number.

71690238671 is a deficient number, since it is larger than the sum of its proper divisors (4217072881).

71690238671 is a wasteful number, since it uses less digits than its factorization.

71690238671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217072880.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 71690238671 in words is "seventy-one billion, six hundred ninety million, two hundred thirty-eight thousand, six hundred seventy-one".

Divisors: 1 17 4217072863 71690238671