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161606105160556 = 2275771646612877
BaseRepresentation
bin100100101111101011011010…
…011111011101101101101100
3210012012101121022220211001211
4210233223122133131231230
5132140223300410114211
61331412453024444204
746016440636660660
oct4457533237355554
9705171538824054
10161606105160556
1147546845334201
1216160419779664
136c2350c7158b4
142bc9ac49ba8a0
1513a3b2b912e21
hex92fada7ddb6c

161606105160556 has 12 divisors (see below), whose sum is σ = 323212210321168. Its totient is φ = 69259759354512.

The previous prime is 161606105160547. The next prime is 161606105160581. The reversal of 161606105160556 is 655061501606161.

161606105160556 is an admirable number.

It is a super-2 number, since 2×1616061051605562 (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2885823306411 + ... + 2885823306466.

Almost surely, 2161606105160556 is an apocalyptic number.

It is an amenable number.

161606105160556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161606105160556 is a wasteful number, since it uses less digits than its factorization.

161606105160556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771646612888 (or 5771646612886 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 161606105160556 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred five million, one hundred sixty thousand, five hundred fifty-six".

Divisors: 1 2 4 7 14 28 5771646612877 11543293225754 23086586451508 40401526290139 80803052580278 161606105160556