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12880831264 = 25757503711
BaseRepresentation
bin10111111111100000…
…11110001100100000
31020020200120000200121
423333300132030200
5202334443100024
65530052530024
7634125154630
oct137760361440
936220500617
1012880831264
11550a9911a4
1225b5920914
1312a37a9262
148a29c86c0
15505c628e4
hex2ffc1e320

12880831264 has 24 divisors (see below), whose sum is σ = 28981870848. Its totient is φ = 5520356160.

The previous prime is 12880831247. The next prime is 12880831267. The reversal of 12880831264 is 46213808821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12880831264.

It is not an unprimeable number, because it can be changed into a prime (12880831267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28751632 + ... + 28752079.

It is an arithmetic number, because the mean of its divisors is an integer number (1207577952).

Almost surely, 212880831264 is an apocalyptic number.

12880831264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12880831264 is an abundant number, since it is smaller than the sum of its proper divisors (16101039584).

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

12880831264 is an equidigital number, since it uses as much as digits as its factorization.

12880831264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57503728 (or 57503720 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 12880831264 in words is "twelve billion, eight hundred eighty million, eight hundred thirty-one thousand, two hundred sixty-four".

Divisors: 1 2 4 7 8 14 16 28 32 56 112 224 57503711 115007422 230014844 402525977 460029688 805051954 920059376 1610103908 1840118752 3220207816 6440415632 12880831264