13887061850 has 12 divisors (see below), whose sum is σ = 25829935134. Its totient is φ = 5554824720.

The previous prime is 13887061841. The next prime is 13887061873. The reversal of 13887061850 is 5816078831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9497866849 + 4389195001 = 97457^2 + 66251^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13887061795 and 13887061804.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138870569 + ... + 138870668.

Almost surely, 2^13887061850 is an apocalyptic number.

13887061850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13887061850 is a deficient number, since it is larger than the sum of its proper divisors (11942873284).

13887061850 is a wasteful number, since it uses less digits than its factorization.

13887061850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277741249 (or 277741244 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 13887061850 in words is "thirteen billion, eight hundred eighty-seven million, sixty-one thousand, eight hundred fifty".