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68975163870 = 2354156077369
BaseRepresentation
bin100000000111100111…
…1010111100111011110
320121000222221100222220
41000033033113213132
52112230120220440
651404201050210
74661161135134
oct1001717274736
9217028840886
1068975163870
1127285755568
121144b786966
136673022a42
1434a4881754
151bda6758d0
hex100f3d79de

68975163870 has 32 divisors (see below), whose sum is σ = 169577966880. Its totient is φ = 17944757760.

The previous prime is 68975163863. The next prime is 68975163871. The reversal of 68975163870 is 7836157986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68975163871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28037455 + ... + 28039914.

It is an arithmetic number, because the mean of its divisors is an integer number (5299311465).

Almost surely, 268975163870 is an apocalyptic number.

68975163870 is an abundant number, since it is smaller than the sum of its proper divisors (100602803010).

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

68975163870 is a wasteful number, since it uses less digits than its factorization.

68975163870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56077420.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 68975163870 in words is "sixty-eight billion, nine hundred seventy-five million, one hundred sixty-three thousand, eight hundred seventy".

Divisors: 1 2 3 5 6 10 15 30 41 82 123 205 246 410 615 1230 56077369 112154738 168232107 280386845 336464214 560773690 841160535 1682321070 2299172129 4598344258 6897516387 11495860645 13795032774 22991721290 34487581935 68975163870