Base | Representation |
---|---|

bin | 10010100001100111001101… |

… | …011010000110001011000100 |

3 | 101200110220101120221221121120 |

4 | 102201213031122012023010 |

5 | 41134340121241330012 |

6 | 445140541320113540 |

7 | 23106231354143103 |

oct | 2241471532061304 |

9 | 350426346857546 |

10 | 81474680808132 |

11 | 23a62244303977 |

12 | 917a4099058b0 |

13 | 366004c884b91 |

14 | 161957770a03a |

15 | 9645240b058c |

hex | 4a19cd6862c4 |

81474680808132 has 12 divisors (see below), whose sum is σ = 190107588552336. Its totient is φ = 27158226936040.

The previous prime is 81474680808113. The next prime is 81474680808179. The reversal of 81474680808132 is 23180808647418.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×81474680808132^{2} (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394778366994 + ... + 3394778367017.

It is an arithmetic number, because the mean of its divisors is an integer number (15842299046028).

Almost surely, 2^{81474680808132} is an apocalyptic number.

It is an amenable number.

81474680808132 is an abundant number, since it is smaller than the sum of its proper divisors (108632907744204).

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

81474680808132 is a wasteful number, since it uses less digits than its factorization.

81474680808132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789556734018 (or 6789556734016 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 60.

The spelling of 81474680808132 in words is "eighty-one trillion, four hundred seventy-four billion, six hundred eighty million, eight hundred eight thousand, one hundred thirty-two".

Divisors: 1 2 3 4 6 12 6789556734011 13579113468022 20368670202033 27158226936044 40737340404066 81474680808132

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