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12660026123 = 17744707419
BaseRepresentation
bin10111100101001100…
…01010101100001011
31012200022001221222102
423302212022230023
5201411431313443
65452124144015
7625504306103
oct136246125413
935608057872
1012660026123
115407289008
12255399800b
131269b19224
1488154c203
154e1698cb8
hex2f298ab0b

12660026123 has 4 divisors (see below), whose sum is σ = 13404733560. Its totient is φ = 11915318688.

The previous prime is 12660026111. The next prime is 12660026143. The reversal of 12660026123 is 32162006621.

12660026123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12660026123 - 220 = 12658977547 is a prime.

It is a super-2 number, since 2×126600261232 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12660026143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372353693 + ... + 372353726.

It is an arithmetic number, because the mean of its divisors is an integer number (3351183390).

Almost surely, 212660026123 is an apocalyptic number.

12660026123 is a deficient number, since it is larger than the sum of its proper divisors (744707437).

12660026123 is an equidigital number, since it uses as much as digits as its factorization.

12660026123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744707436.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 12660026123 in words is "twelve billion, six hundred sixty million, twenty-six thousand, one hundred twenty-three".

Divisors: 1 17 744707419 12660026123