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12758878080 = 2733513217257
BaseRepresentation
bin10111110000111110…
…10000011110000000
31012221012002011101000
423320133100132000
5202112233044310
65510015012000
7631114450164
oct137037203600
935835064330
1012758878080
115458065a43
122580b0a000
13128444a300
14890720ca4
154ea1c34c0
hex2f87d0780

12758878080 has 768 divisors, whose sum is σ = 52010942400. Its totient is φ = 2944401408.

The previous prime is 12758878061. The next prime is 12758878117. The reversal of 12758878080 is 8087885721.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 49645312 + ... + 49645568.

Almost surely, 212758878080 is an apocalyptic number.

12758878080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12758878080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26005471200).

12758878080 is an abundant number, since it is smaller than the sum of its proper divisors (39252064320).

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

12758878080 is a wasteful number, since it uses less digits than its factorization.

12758878080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 54.

The spelling of 12758878080 in words is "twelve billion, seven hundred fifty-eight million, eight hundred seventy-eight thousand, eighty".