13638541550 has 48 divisors (see below), whose sum is σ = 26977581360. Its totient is φ = 5112015360.

The previous prime is 13638541549. The next prime is 13638541559. The reversal of 13638541550 is 5514583631.

It is a super-2 number, since 2×13638541550² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13638541498 and 13638541507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638541559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159617 + ... + 229683.

It is an arithmetic number, because the mean of its divisors is an integer number (562032945).

Almost surely, 2^13638541550 is an apocalyptic number.

13638541550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13638541550 is a deficient number, since it is larger than the sum of its proper divisors (13339039810).

13638541550 is a wasteful number, since it uses less digits than its factorization.

13638541550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70325 (or 70320 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 13638541550 in words is "thirteen billion, six hundred thirty-eight million, five hundred forty-one thousand, five hundred fifty".