13181539840 has 160 divisors (see below), whose sum is σ = 36204182784. Its totient is φ = 4508835840.

The previous prime is 13181539829. The next prime is 13181539859. The reversal of 13181539840 is 4893518131.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14532667 + ... + 14533573.

Almost surely, 2^13181539840 is an apocalyptic number.

13181539840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13181539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18102091392).

13181539840 is an abundant number, since it is smaller than the sum of its proper divisors (23022642944).

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

13181539840 is an frugal number, since it uses more digits than its factorization.

13181539840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 13181539840 in words is "thirteen billion, one hundred eighty-one million, five hundred thirty-nine thousand, eight hundred forty".