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161205280112676 = 22313433773342723
BaseRepresentation
bin100100101001110110000111…
…011101010000000000100100
3210010210002000010212200011010
4210221312013131100000210
5132112141403202101201
61330504403332542220
745645461056201362
oct4451660735200044
9703702003780133
10161205280112676
1147401859013158
12160b67b6181970
136bc4792194757
142bb453d00c632
1513984bc895bd6
hex929d87750024

161205280112676 has 12 divisors (see below), whose sum is σ = 376145653596272. Its totient is φ = 53735093370888.

The previous prime is 161205280112659. The next prime is 161205280112777. The reversal of 161205280112676 is 676211082502161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6716886671350 + ... + 6716886671373.

Almost surely, 2161205280112676 is an apocalyptic number.

It is an amenable number.

161205280112676 is an abundant number, since it is smaller than the sum of its proper divisors (214940373483596).

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

161205280112676 is a wasteful number, since it uses less digits than its factorization.

161205280112676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13433773342730 (or 13433773342728 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 161205280112676 in words is "one hundred sixty-one trillion, two hundred five billion, two hundred eighty million, one hundred twelve thousand, six hundred seventy-six".

Divisors: 1 2 3 4 6 12 13433773342723 26867546685446 40301320028169 53735093370892 80602640056338 161205280112676