8138445328815 has 32 divisors (see below), whose sum is σ = 13030460651520. Its totient is φ = 4337522536704.

The previous prime is 8138445328799. The next prime is 8138445328831. The reversal of 8138445328815 is 5188235448318.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8138445328799) and next prime (8138445328831).

It is not a de Polignac number, because 8138445328815 - 2⁴ = 8138445328799 is a prime.

It is a super-2 number, since 2×8138445328815² (a number of 27 digits) contains 22 as substring.

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, 133634302 + ... + 133695188.

It is an arithmetic number, because the mean of its divisors is an integer number (407201895360).

Almost surely, 2^{8138445328815} is an apocalyptic number.

8138445328815 is a deficient number, since it is larger than the sum of its proper divisors (4892015322705).

8138445328815 is a wasteful number, since it uses less digits than its factorization.

8138445328815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66871.

The product of its digits is 29491200, while the sum is 60.

The spelling of 8138445328815 in words is "eight trillion, one hundred thirty-eight billion, four hundred forty-five million, three hundred twenty-eight thousand, eight hundred fifteen".