13655745720 has 128 divisors (see below), whose sum is σ = 48196814400. Its totient is φ = 3427319808.

The previous prime is 13655745709. The next prime is 13655745773. The reversal of 13655745720 is 2754755631.

It is a happy number.

13655745720 is a `hidden beast` number, since 1 + 3 + 6 + 5 + 5 + 74 + 572 + 0 = 666.

13655745720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353529 + ... + 390248.

Almost surely, 2^13655745720 is an apocalyptic number.

13655745720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13655745720 is an abundant number, since it is smaller than the sum of its proper divisors (34541068680).

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

13655745720 is a wasteful number, since it uses less digits than its factorization.

13655745720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743814 (or 743804 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 45.

It can be divided in two parts, 13655 and 745720, that added together give a 5-th power (759375 = 15⁵).

The spelling of 13655745720 in words is "thirteen billion, six hundred fifty-five million, seven hundred forty-five thousand, seven hundred twenty".