13815250538 has 16 divisors (see below), whose sum is σ = 20936335680. Its totient is φ = 6836550816.

The previous prime is 13815250507. The next prime is 13815250543. The reversal of 13815250538 is 83505251831.

It is a super-2 number, since 2×13815250538² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13815250495 and 13815250504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349358 + ... + 386886.

It is an arithmetic number, because the mean of its divisors is an integer number (1308520980).

Almost surely, 2^13815250538 is an apocalyptic number.

13815250538 is a deficient number, since it is larger than the sum of its proper divisors (7121085142).

13815250538 is a wasteful number, since it uses less digits than its factorization.

13815250538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39421.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 13815250538 in words is "thirteen billion, eight hundred fifteen million, two hundred fifty thousand, five hundred thirty-eight".