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12750553291 = 79740146829
BaseRepresentation
bin10111101111111111…
…00000000011001011
31012220121102012220111
423313333200003023
5202103120201131
65505120335151
7630653625520
oct136777400313
935817365814
1012750553291
11545339a453
12257a1744b7
1312827c40b8
1488d595147
154e95cbab1
hex2f7fe00cb

12750553291 has 16 divisors (see below), whose sum is σ = 14759317440. Its totient is φ = 10789171200.

The previous prime is 12750553271. The next prime is 12750553331. The reversal of 12750553291 is 19235505721.

It is a cyclic number.

It is not a de Polignac number, because 12750553291 - 25 = 12750553259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12750553241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248865 + ... + 295693.

It is an arithmetic number, because the mean of its divisors is an integer number (922457340).

Almost surely, 212750553291 is an apocalyptic number.

12750553291 is a deficient number, since it is larger than the sum of its proper divisors (2008764149).

12750553291 is an equidigital number, since it uses as much as digits as its factorization.

12750553291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47334.

The product of its (nonzero) digits is 94500, while the sum is 40.

The spelling of 12750553291 in words is "twelve billion, seven hundred fifty million, five hundred fifty-three thousand, two hundred ninety-one".

Divisors: 1 7 97 401 679 2807 38897 46829 272279 327803 4542413 18778429 31796891 131449003 1821507613 12750553291