13643438121215 has 32 divisors (see below), whose sum is σ = 18745609918464. Its totient is φ = 9338199137280.

The previous prime is 13643438121167. The next prime is 13643438121233. The reversal of 13643438121215 is 51212183434631.

It is not a de Polignac number, because 13643438121215 - 2²⁸ = 13643169685759 is a prime.

It is a super-2 number, since 2×13643438121215² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250324847 + ... + 250379343.

It is an arithmetic number, because the mean of its divisors is an integer number (585800309952).

Almost surely, 2^{13643438121215} is an apocalyptic number.

13643438121215 is a deficient number, since it is larger than the sum of its proper divisors (5102171797249).

13643438121215 is a wasteful number, since it uses less digits than its factorization.

13643438121215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67607.

The product of its digits is 414720, while the sum is 44.

The spelling of 13643438121215 in words is "thirteen trillion, six hundred forty-three billion, four hundred thirty-eight million, one hundred twenty-one thousand, two hundred fifteen".