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12638875125125 = 53101111001001
BaseRepresentation
bin1011011111101011011110…
…1010011000010110000101
31122202021010221100010112202
42313322313222120112011
53124033404013001000
642514115153124245
72443062051663524
oct267726752302605
948667127303482
1012638875125125
114033131571287
1215015b9859685
13708ac134c6c2
14319a20c984bb
1516db75b28dd5
hexb7eb7a98585

12638875125125 has 8 divisors (see below), whose sum is σ = 15773316156312. Its totient is φ = 10111100100000.

The previous prime is 12638875125077. The next prime is 12638875125127. The reversal of 12638875125125 is 52152157883621.

It can be written as a sum of positive squares in 4 ways, for example, as 56658756961 + 12582216368164 = 238031^2 + 3547142^2 .

It is not a de Polignac number, because 12638875125125 - 224 = 12638858347909 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 (12638875125127) 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, 50555500376 + ... + 50555500625.

It is an arithmetic number, because the mean of its divisors is an integer number (1971664519539).

Almost surely, 212638875125125 is an apocalyptic number.

It is an amenable number.

12638875125125 is a deficient number, since it is larger than the sum of its proper divisors (3134441031187).

12638875125125 is an equidigital number, since it uses as much as digits as its factorization.

12638875125125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101111001016 (or 101111001006 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 56.

The spelling of 12638875125125 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred seventy-five million, one hundred twenty-five thousand, one hundred twenty-five".