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12881488587 = 311390348139
BaseRepresentation
bin10111111111100101…
…11110101011001011
31020020201210102100220
423333302332223023
5202340130113322
65530115001123
7634133563212
oct137762765313
936221712326
1012881488587
1155102a0040
1225b5b991a3
1312a39794c6
148a2b1a079
15505d4255c
hex2ffcbeacb

12881488587 has 8 divisors (see below), whose sum is σ = 18736710720. Its totient is φ = 7806962760.

The previous prime is 12881488561. The next prime is 12881488639. The reversal of 12881488587 is 78588418821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12881488587 - 28 = 12881488331 is a prime.

It is a super-2 number, since 2×128814885872 (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12881488587.

It is not an unprimeable number, because it can be changed into a prime (12881486587) 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, 195174037 + ... + 195174102.

It is an arithmetic number, because the mean of its divisors is an integer number (2342088840).

Almost surely, 212881488587 is an apocalyptic number.

12881488587 is a deficient number, since it is larger than the sum of its proper divisors (5855222133).

12881488587 is a wasteful number, since it uses less digits than its factorization.

12881488587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390348153.

The product of its digits is 9175040, while the sum is 60.

The spelling of 12881488587 in words is "twelve billion, eight hundred eighty-one million, four hundred eighty-eight thousand, five hundred eighty-seven".

Divisors: 1 3 11 33 390348139 1171044417 4293829529 12881488587