13641405820 has 24 divisors (see below), whose sum is σ = 32739374304. Its totient is φ = 4677053376.

The previous prime is 13641405803. The next prime is 13641405853. The reversal of 13641405820 is 2850414631.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48719167 + ... + 48719446.

It is an arithmetic number, because the mean of its divisors is an integer number (1364140596).

Almost surely, 2^13641405820 is an apocalyptic number.

13641405820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13641405820 is an abundant number, since it is smaller than the sum of its proper divisors (19097968484).

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

13641405820 is a wasteful number, since it uses less digits than its factorization.

13641405820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97438629 (or 97438627 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 13641405820 in words is "thirteen billion, six hundred forty-one million, four hundred five thousand, eight hundred twenty".