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91109667023 = 643451331397
BaseRepresentation
bin101010011011010001…
…1110011000011001111
322201011120220122002222
41110312203303003033
52443043033321043
6105504420205555
76403532251244
oct1246643630317
9281146818088
1091109667023
1135704039381
12157a85398bb
13878c9a909b
1445a44355cb
1525839c1d68
hex15368f30cf

91109667023 has 8 divisors (see below), whose sum is σ = 91274488368. Its totient is φ = 90944918784.

The previous prime is 91109667001. The next prime is 91109667029. The reversal of 91109667023 is 32076690119.

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

It is a cyclic number.

It is not a de Polignac number, because 91109667023 - 216 = 91109601487 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 (91109667029) 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, 2886161 + ... + 2917557.

It is an arithmetic number, because the mean of its divisors is an integer number (11409311046).

Almost surely, 291109667023 is an apocalyptic number.

91109667023 is a deficient number, since it is larger than the sum of its proper divisors (164821345).

91109667023 is a wasteful number, since it uses less digits than its factorization.

91109667023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36553.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 91109667023 in words is "ninety-one billion, one hundred nine million, six hundred sixty-seven thousand, twenty-three".

Divisors: 1 643 4513 31397 2901859 20188271 141694661 91109667023