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7068120281 = 1031134311409
BaseRepresentation
bin1101001010100101…
…01111010011011001
3200020120220201020122
412211102233103121
5103433414322111
63125210203025
7340104013445
oct64522572331
920216821218
107068120281
112aa7851422
121453123475
13888466cc1
144b0a0d825
152b57c2cdb
hex1a54af4d9

7068120281 has 16 divisors (see below), whose sum is σ = 7221726720. Its totient is φ = 6916546560.

The previous prime is 7068120259. The next prime is 7068120299. The reversal of 7068120281 is 1820218607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7068120281 is a prime.

It is a super-2 number, since 2×70681202812 = 99916648613367037922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7068120181) 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, 5015705 + ... + 5017113.

It is an arithmetic number, because the mean of its divisors is an integer number (451357920).

Almost surely, 27068120281 is an apocalyptic number.

It is an amenable number.

7068120281 is a deficient number, since it is larger than the sum of its proper divisors (153606439).

7068120281 is a wasteful number, since it uses less digits than its factorization.

7068120281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 7068120281 is about 84072.1135751921. The cubic root of 7068120281 is about 1919.1163722777.

Adding to 7068120281 its reverse (1820218607), we get a palindrome (8888338888).

The spelling of 7068120281 in words is "seven billion, sixty-eight million, one hundred twenty thousand, two hundred eighty-one".

Divisors: 1 103 113 431 1409 11639 44393 48703 145127 159217 607279 5016409 16399351 62549737 68622527 7068120281