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12885890749 = 71619293201
BaseRepresentation
bin11000000000000111…
…10001011010111101
31020021001002001222221
430000003301122331
5202342242000444
65530353205341
7634216156414
oct140003613275
936231061887
1012885890749
115512827496
1225b7560851
1312a485b134
148a354447b
15506411a84
hex3000f16bd

12885890749 has 8 divisors (see below), whose sum is σ = 13088537280. Its totient is φ = 12683832000.

The previous prime is 12885890681. The next prime is 12885890753. The reversal of 12885890749 is 94709858821.

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

It is a cyclic number.

It is not a de Polignac number, because 12885890749 - 213 = 12885882557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12885893749) 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, 102652 + ... + 190549.

It is an arithmetic number, because the mean of its divisors is an integer number (1636067160).

Almost surely, 212885890749 is an apocalyptic number.

It is an amenable number.

12885890749 is a deficient number, since it is larger than the sum of its proper divisors (202646531).

12885890749 is an equidigital number, since it uses as much as digits as its factorization.

12885890749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293891.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 12885890749 in words is "twelve billion, eight hundred eighty-five million, eight hundred ninety thousand, seven hundred forty-nine".

Divisors: 1 71 619 43949 293201 20817271 181491419 12885890749