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81729266099696 = 245108079131231
BaseRepresentation
bin10010100101010100010011…
…110111111010010111110000
3101201101020112002002202021022
4102211110103313322113300
541203023014110142241
6445453523450315012
723133513255335615
oct2245242367722760
9351336462082238
1081729266099696
1124050207043586
1291bb819a28a68
13367b0628b1337
141627a090aa50c
1596ae7471454b
hex4a5513dfa5f0

81729266099696 has 10 divisors (see below), whose sum is σ = 158350453068192. Its totient is φ = 40864633049840.

The previous prime is 81729266099671. The next prime is 81729266099743. The reversal of 81729266099696 is 69699066292718.

It is a super-2 number, since 2×817292660996962 (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81729266099696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2554039565600 + ... + 2554039565631.

Almost surely, 281729266099696 is an apocalyptic number.

It is an amenable number.

81729266099696 is a deficient number, since it is larger than the sum of its proper divisors (76621186968496).

81729266099696 is a wasteful number, since it uses less digits than its factorization.

81729266099696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108079131239 (or 5108079131233 counting only the distinct ones).

The product of its (nonzero) digits is 1904684544, while the sum is 80.

Adding to 81729266099696 its sum of digits (80), we get a square (81729266099776 = 90404242).

The spelling of 81729266099696 in words is "eighty-one trillion, seven hundred twenty-nine billion, two hundred sixty-six million, ninety-nine thousand, six hundred ninety-six".

Divisors: 1 2 4 8 16 5108079131231 10216158262462 20432316524924 40864633049848 81729266099696