13405535405320 has 64 divisors (see below), whose sum is σ = 31109201625600. Its totient is φ = 5196162796800.

The previous prime is 13405535405309. The next prime is 13405535405407. The reversal of 13405535405320 is 2350453550431.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35110140 + ... + 35489899.

It is an arithmetic number, because the mean of its divisors is an integer number (486081275400).

Almost surely, 2^{13405535405320} is an apocalyptic number.

13405535405320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13405535405320 is an abundant number, since it is smaller than the sum of its proper divisors (17703666220280).

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

13405535405320 is a wasteful number, since it uses less digits than its factorization.

13405535405320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70600198 (or 70600194 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 13405535405320 its reverse (2350453550431), we get a palindrome (15755988955751).

The spelling of 13405535405320 in words is "thirteen trillion, four hundred five billion, five hundred thirty-five million, four hundred five thousand, three hundred twenty".