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13878231126428 = 2241429719693591
BaseRepresentation
bin1100100111110100011100…
…0010010101000110011100
31211010202010210022020220002
43021331013002111012130
53304340104132021203
645303323225313432
72631445335120254
oct311750702250634
954122123266802
1013878231126428
1144707a7736689
12168183b635878
13798933457436
1435d9d2232964
151910109dbd88
hexc9f4709519c

13878231126428 has 24 divisors (see below), whose sum is σ = 24885059174304. Its totient is φ = 6768293011200.

The previous prime is 13878231126427. The next prime is 13878231126449. The reversal of 13878231126428 is 82462113287831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878231126427) 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, 9142088 + ... + 10551503.

It is an arithmetic number, because the mean of its divisors is an integer number (1036877465596).

Almost surely, 213878231126428 is an apocalyptic number.

It is an amenable number.

13878231126428 is a deficient number, since it is larger than the sum of its proper divisors (11006828047876).

13878231126428 is a wasteful number, since it uses less digits than its factorization.

13878231126428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19697933 (or 19697931 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 56.

The spelling of 13878231126428 in words is "thirteen trillion, eight hundred seventy-eight billion, two hundred thirty-one million, one hundred twenty-six thousand, four hundred twenty-eight".

Divisors: 1 2 4 41 82 164 4297 8594 17188 176177 352354 704708 19693591 39387182 78774364 807437231 1614874462 3229748924 84623360527 169246721054 338493442108 3469557781607 6939115563214 13878231126428