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88138828813 = 7171961639053
BaseRepresentation
bin101001000010101111…
…0111100110000001101
322102111112202102020011
41102011132330300031
52421002020010223
6104253532553221
76240106453330
oct1220536746015
9272445672204
1088138828813
113441a086692
12150b9622811
138408365159
1443a1a60617
15245cc8d80d
hex14857bcc0d

88138828813 has 32 divisors (see below), whose sum is σ = 114109482240. Its totient is φ = 66256911360.

The previous prime is 88138828807. The next prime is 88138828823. The reversal of 88138828813 is 31882883188.

It is a cyclic number.

It is not a de Polignac number, because 88138828813 - 25 = 88138828781 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88138828823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181606 + ... + 457447.

It is an arithmetic number, because the mean of its divisors is an integer number (3565921320).

Almost surely, 288138828813 is an apocalyptic number.

It is an amenable number.

88138828813 is a deficient number, since it is larger than the sum of its proper divisors (25970653427).

88138828813 is a wasteful number, since it uses less digits than its factorization.

88138828813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639157.

The product of its digits is 4718592, while the sum is 58.

The spelling of 88138828813 in words is "eighty-eight billion, one hundred thirty-eight million, eight hundred twenty-eight thousand, eight hundred thirteen".

Divisors: 1 7 17 19 61 119 133 323 427 1037 1159 2261 7259 8113 19703 137921 639053 4473371 10863901 12142007 38982233 76047307 84994049 206414119 272875631 662697961 740662427 1444898833 4638885727 5184636989 12591261259 88138828813