Search a number
-
+
91040006771 = 779283581729
BaseRepresentation
bin101010011001001101…
…0000100001001110011
322200222201211112012122
41110302122010021303
52442422220204041
6105453451144455
76402025201160
oct1246232041163
9280881745178
1091040006771
113567878a61a
121578914512b
13877b4290bc
1445990a1067
15257c811c4b
hex1532684273

91040006771 has 16 divisors (see below), whose sum is σ = 105735244800. Its totient is φ = 76774134528.

The previous prime is 91040006753. The next prime is 91040006773. The reversal of 91040006771 is 17760004019.

It is not a de Polignac number, because 91040006771 - 226 = 90972897907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91040006773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134366 + ... + 447363.

It is an arithmetic number, because the mean of its divisors is an integer number (6608452800).

Almost surely, 291040006771 is an apocalyptic number.

91040006771 is a deficient number, since it is larger than the sum of its proper divisors (14695238029).

91040006771 is a wasteful number, since it uses less digits than its factorization.

91040006771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582098.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 91040006771 in words is "ninety-one billion, forty million, six thousand, seven hundred seventy-one".

Divisors: 1 7 79 283 553 1981 22357 156499 581729 4072103 45956591 164629307 321696137 1152405149 13005715253 91040006771