13581881650 has 24 divisors (see below), whose sum is σ = 25461227520. Its totient is φ = 5389972560.

The previous prime is 13581881633. The next prime is 13581881693. The reversal of 13581881650 is 5618818531.

It is a self number, because there is not a number n which added to its sum of digits gives 13581881650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063090 + ... + 1075789.

It is an arithmetic number, because the mean of its divisors is an integer number (1060884480).

Almost surely, 2^13581881650 is an apocalyptic number.

13581881650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13581881650 is a deficient number, since it is larger than the sum of its proper divisors (11879345870).

13581881650 is a wasteful number, since it uses less digits than its factorization.

13581881650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139018 (or 2139013 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 46.

The spelling of 13581881650 in words is "thirteen billion, five hundred eighty-one million, eight hundred eighty-one thousand, six hundred fifty".