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7064561380 = 2251918590951
BaseRepresentation
bin1101001010001010…
…01010011011100100
3200020100012220100111
412211011022123210
5103432011431010
63125002022404
7340031531602
oct64505123344
920210186314
107064561380
112aa5840588
121451aa7a04
138877bc146
144b0364872
152b531d58a
hex1a514a6e4

7064561380 has 24 divisors (see below), whose sum is σ = 15616399680. Its totient is φ = 2677096800.

The previous prime is 7064561303. The next prime is 7064561381. The reversal of 7064561380 is 831654607.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7064561381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9295096 + ... + 9295855.

It is an arithmetic number, because the mean of its divisors is an integer number (650683320).

Almost surely, 27064561380 is an apocalyptic number.

It is an amenable number.

7064561380 is an abundant number, since it is smaller than the sum of its proper divisors (8551838300).

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

7064561380 is a wasteful number, since it uses less digits than its factorization.

7064561380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18590979 (or 18590977 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 7064561380 is about 84050.9451463813. The cubic root of 7064561380 is about 1918.7942172327.

The spelling of 7064561380 in words is "seven billion, sixty-four million, five hundred sixty-one thousand, three hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 18590951 37181902 74363804 92954755 185909510 353228069 371819020 706456138 1412912276 1766140345 3532280690 7064561380