13581619131940 has 24 divisors (see below), whose sum is σ = 28568856775032. Its totient is φ = 5423608300800.

The previous prime is 13581619131937. The next prime is 13581619131959. The reversal of 13581619131940 is 4913191618531.

It is a happy number.

13581619131940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5734942511076 + 7846676620864 = 2394774^2 + 2801192^2 .

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, 564947179 + ... + 564971218.

It is an arithmetic number, because the mean of its divisors is an integer number (1190369032293).

Almost surely, 2^{13581619131940} is an apocalyptic number.

13581619131940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13581619131940 is an abundant number, since it is smaller than the sum of its proper divisors (14987237643092).

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

13581619131940 is a wasteful number, since it uses less digits than its factorization.

13581619131940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129919007 (or 1129919005 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 13581619131940 in words is "thirteen trillion, five hundred eighty-one billion, six hundred nineteen million, one hundred thirty-one thousand, nine hundred forty".