13387985910 has 128 divisors (see below), whose sum is σ = 38526606720. Its totient is φ = 3288729600.

The previous prime is 13387985893. The next prime is 13387985917. The reversal of 13387985910 is 1958978331.

13387985910 is a `hidden beast` number, since 13 + 38 + 7 + 9 + 8 + 591 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13387985917) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1825050 + ... + 1832370.

It is an arithmetic number, because the mean of its divisors is an integer number (300989115).

Almost surely, 2^13387985910 is an apocalyptic number.

13387985910 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 13387985910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19263303360).

13387985910 is an abundant number, since it is smaller than the sum of its proper divisors (25138620810).

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

13387985910 is a wasteful number, since it uses less digits than its factorization.

13387985910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7871 (or 7865 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 13387985910 in words is "thirteen billion, three hundred eighty-seven million, nine hundred eighty-five thousand, nine hundred ten".