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12788088721 = 173124265823
BaseRepresentation
bin10111110100011101…
…01011111110010001
31020000020001012211121
423322032223332101
5202142222314341
65512541042241
7631620650332
oct137216537621
936006035747
1012788088721
1154725a7371
12258a856381
13128a506c05
14894566289
154eca434d1
hex2fa3abf91

12788088721 has 8 divisors (see below), whose sum is σ = 13977114624. Its totient is φ = 11647594560.

The previous prime is 12788088707. The next prime is 12788088767.

12788088721 is nontrivially palindromic in base 10.

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 12788088721 - 25 = 12788088689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12788088421) 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, 12132385 + ... + 12133438.

It is an arithmetic number, because the mean of its divisors is an integer number (1747139328).

Almost surely, 212788088721 is an apocalyptic number.

It is an amenable number.

12788088721 is a deficient number, since it is larger than the sum of its proper divisors (1189025903).

12788088721 is a wasteful number, since it uses less digits than its factorization.

12788088721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24265871.

The product of its (nonzero) digits is 802816, while the sum is 52.

The spelling of 12788088721 in words is "twelve billion, seven hundred eighty-eight million, eighty-eight thousand, seven hundred twenty-one".

Divisors: 1 17 31 527 24265823 412518991 752240513 12788088721