13113344540 has 24 divisors (see below), whose sum is σ = 27540174480. Its totient is φ = 5244928128.

The previous prime is 13113344509. The next prime is 13113344599. The reversal of 13113344540 is 4544331131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499256 + ... + 524864.

It is an arithmetic number, because the mean of its divisors is an integer number (1147507270).

Almost surely, 2^13113344540 is an apocalyptic number.

13113344540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13113344540 is an abundant number, since it is smaller than the sum of its proper divisors (14426829940).

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

13113344540 is a wasteful number, since it uses less digits than its factorization.

13113344540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51221 (or 51219 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 13113344540 its reverse (4544331131), we get a palindrome (17657675671).

The spelling of 13113344540 in words is "thirteen billion, one hundred thirteen million, three hundred forty-four thousand, five hundred forty".