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68809786701 = 31491483103801
BaseRepresentation
bin100000000010101100…
…0100000010101001101
320120121110202100011120
41000011120200111031
52111410301133301
651335532311153
74654112352015
oct1000530402515
9216543670146
1068809786701
1127200370217
12114043124b9
13664799b926
14348a912c45
151bcada9e36
hex100562054d

68809786701 has 16 divisors (see below), whose sum is σ = 92425300800. Its totient is φ = 45534153600.

The previous prime is 68809786697. The next prime is 68809786811. The reversal of 68809786701 is 10768790886.

It is not a de Polignac number, because 68809786701 - 22 = 68809786697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68809786501) 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, 611001 + ... + 714801.

It is an arithmetic number, because the mean of its divisors is an integer number (5776581300).

Almost surely, 268809786701 is an apocalyptic number.

It is an amenable number.

68809786701 is a deficient number, since it is larger than the sum of its proper divisors (23615514099).

68809786701 is a wasteful number, since it uses less digits than its factorization.

68809786701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105436.

The product of its (nonzero) digits is 8128512, while the sum is 60.

The spelling of 68809786701 in words is "sixty-eight billion, eight hundred nine million, seven hundred eighty-six thousand, seven hundred one".

Divisors: 1 3 149 447 1483 4449 103801 220967 311403 662901 15466349 46399047 153936883 461810649 22936595567 68809786701