13871015550 has 432 divisors, whose sum is σ = 46193762160. Its totient is φ = 2966906880.

The previous prime is 13871015539. The next prime is 13871015579. The reversal of 13871015550 is 5551017831.

13871015550 is a `hidden beast` number, since 1 + 3 + 87 + 10 + 15 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 47341204 + ... + 47341496.

It is an arithmetic number, because the mean of its divisors is an integer number (106930005).

Almost surely, 2^13871015550 is an apocalyptic number.

13871015550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13871015550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23096881080).

13871015550 is an abundant number, since it is smaller than the sum of its proper divisors (32322746610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13871015550 is a wasteful number, since it uses less digits than its factorization.

13871015550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 13871015550 in words is "thirteen billion, eight hundred seventy-one million, fifteen thousand, five hundred fifty".