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11111009905 = 519377940013
BaseRepresentation
bin10100101100100010…
…01000111001110001
31001200100022210012101
422112101020321301
5140223404304110
65034311300401
7542225011612
oct122621107161
931610283171
1011111009905
11479196a216
1221a107a701
131080c24598
14775929c09
154506bb13a
hex296448e71

11111009905 has 32 divisors (see below), whose sum is σ = 14597107200. Its totient is φ = 8089466112.

The previous prime is 11111009879. The next prime is 11111009911. The reversal of 11111009905 is 50990011111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11111009905 - 223 = 11102621297 is a prime.

It is a super-2 number, since 2×111110099052 (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257679 + ... + 297691.

It is an arithmetic number, because the mean of its divisors is an integer number (456159600).

Almost surely, 211111009905 is an apocalyptic number.

It is an amenable number.

11111009905 is a deficient number, since it is larger than the sum of its proper divisors (3486097295).

11111009905 is a wasteful number, since it uses less digits than its factorization.

11111009905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40153.

The product of its (nonzero) digits is 405, while the sum is 28.

The spelling of 11111009905 in words is "eleven billion, one hundred eleven million, nine thousand, nine hundred five".

Divisors: 1 5 19 37 79 95 185 395 703 1501 2923 3515 7505 14615 40013 55537 200065 277685 760247 1480481 3161027 3801235 7402405 15805135 28129139 60059513 116957999 140645695 300297565 584789995 2222201981 11111009905