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72715065123 = 31311249148139
BaseRepresentation
bin100001110111000100…
…1111101011100100011
320221200122020001001010
41003232021331130203
52142410024040443
653223240112003
75152642566261
oct1035611753443
9227618201033
1072715065123
1128924838748
1212114165603
136b1aaa726c
14373b44b431
151d58b6e733
hex10ee27d723

72715065123 has 16 divisors (see below), whose sum is σ = 97772400000. Its totient is φ = 48067818240.

The previous prime is 72715065121. The next prime is 72715065139. The reversal of 72715065123 is 32156051727.

It is a happy number.

It is not a de Polignac number, because 72715065123 - 21 = 72715065121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72715065121) 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, 416788 + ... + 564926.

It is an arithmetic number, because the mean of its divisors is an integer number (6110775000).

Almost surely, 272715065123 is an apocalyptic number.

72715065123 is a deficient number, since it is larger than the sum of its proper divisors (25057334877).

72715065123 is a wasteful number, since it uses less digits than its factorization.

72715065123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149522.

The product of its (nonzero) digits is 88200, while the sum is 39.

The spelling of 72715065123 in words is "seventy-two billion, seven hundred fifteen million, sixty-five thousand, one hundred twenty-three".

Divisors: 1 3 131 393 1249 3747 148139 163619 444417 490857 19406209 58218627 185025611 555076833 24238355041 72715065123